Prime assets or not, it was team/asset management that put that team together, not player collusion, which ultimately I think was his point
Yeah, what I'm saying is that his point is optimistic, at best 
Player collusion is a tricky thing to define and it's hard to prove definitively. KG didn't have a no-trade clause, but he was on the last year of his contract and could walk for nothing without signing an extension, so the idea that he didn't have to be wooed is a little silly.
In fact, KG has talked about this, at length, if you want to hear it in the very singular way that KG can tell it, it starts around the 50 minute mark.
https://www.youtube.com/watch?v=2heygSelm4A
you know about I looked at it like this I was like man I got one chance Oakland, I had Phoenix I had the Lakers and I had the Celtics and I'm just being honest with everybody I wanted to link with Kobe 'cause and I had like a different a different connect like when Kobe Shaq when their little thing went on a lot of people went with Shaq, a lot of people didn't even f- with Kobe you know, Kobe whatever I'm on the very few that stayed with him and just I was a neutral guy anyway I showed everybody love, but Kobe respected dogs. Like real cats.
I tried to link with him, and I couldn't get him on the line and he was like s-
Chaunce is like 'Dawg you got to get off that [ __ ] him and T Lou was just showing me like yo you gotta. this you're chance to' go get with somebody you can give him somebody real you can man that same [ __ ] you doing in minnesota you'll put there with somebody else before you you know I'm saying sounds like [ __ I shouted Kobe... he wouldn't pick the line up. So T-Lue and Kobe are close and T-Lou was like 'shoot at him again and see what he on', so I shot at him, he didn't hit back... I had to make a decision coming down and you know you know I'm making decisions by myself, I'm talking to my my wife at the time and I'm like asking her like she's like go with your gut so I was like [ __ ] Danny Ainge flew in and got right to it.
So, sure, KG had absolutely no say in forming the big 3. 
Edit: a little later:
and then I actually called Steve Nash just at the courtesy and I guess the call... he kicked me back was like yo if you come down here we need you to take a major pay cut and I was like okay if I come down now I'm playing with you and A'mare right? And he said I think they're gonna give A'Mare up for you and Shawn and I said so who... but it's me and you? Biiiiig sigh.... yeah so I got to pick a pay cut and then we're back in this position and we in the West...
i think we have different viewpoints on what player collusion is. If my memory serves me correct, Kevin Garnett was told by Minny that they were rebuilding and would like to trade him, since KG had a no trade clause, it was essentially up to him to find a trade partner that KG wanted and could also provide Minny the assets to make it work.
For me, what youre pointing out from that interview is just Kevin Garnett hemming and hawing about who he would want to play with (which is what any free agent would do), and in the case of him calling Nash, thats KG doing his due diligence to see what kind of team he would have left to play with after the trade. The fact that it was a team executive that ultimately convinced KG to come to Boston and not some pre planned player agreement proves there was no collusion.
Player collusion for me, is when players enter free agency already having an agreement with other players that theyre all going to sign together in a predetermined place, or even worse, force a trade to a predetermined place. Theyre robbing other teams of a competitive chance to obtain their services. Its terrible for small market teams. Its also terrible for the league from a competition standpoint, teams end up having stars that know theyre leaving next year to team up elsewhere so they have no incentive to perform in the playoffs, Kyrie his season here, and Lebron before he left for Miami are perfect examples. Whether you think they quit or not, its impossible for that player to not already be looking towards the next season before the current one is finished and not have it affect their competitive drive
So, from my perspective....
KG, Pierce, Ray Allen - was all team asset management and the GM doing a great job to convince a player to waive his no trade clause to come to his team, which is his job
Wade, Lebron, Bosh - player collusion, its pretty well known that they all agreed to all leave their teams and sign with Miami
Kevin Durant to Golden State - pretty cowardly from a competitive standpoint, but not player collusion. People give Durant a lot of crap for this but at least he was willing to hear a handful of teams out and nearly signed here instead
Anthony Davis to the Lakers - you can frame this one to fit either side of the arguement, frankly. In my opinion, and him and Lebron talked and wanted to meet in LA, which is why he tried to force the trade there and no just wait until free agency, Lebron knew his window was starting to close
Kyrie, Durant, and Harden - Blatant player collusion.
For me, I see a distinct difference between the KG, Pierce, and Ray Allen scenario and the others listed. Perhaps youll think Im just playing semantics, and perhaps I am, but for me, its a big difference. Also couple this with the fact that Kevin Garnett and Ray Allen were in their 30s, they were beginning to exit the prime of their careers, it made more sense for them at this point