Considering this thread started with a fantasy narrative about a non-poaching clause, I can't blame you.
Ultimately the best we can do is speculate, and this is going to cause people to disregard what they don't want to hear - I don't know if you've got an Athletic subscription, but I'm sure there are plenty of people who will read the quote from the team source who claims Mazzulla was "super hard" on the Jays as well as the role players behind closed doors and claim it's not rooted in reality because it doesn't fit their preferred narrative either.
care to elaborate on the fantasy narrative?
Sure, and apologies for the shorthand if it felt dismissive. Wasn't my intent
Short explanation: Ownership won't go for it because allowing that kind of language into
one head coach's contract would be an impediment to how the league likes to function, as well as very quickly creating a massive amount of extra work for
every front office. The coach's union won't go for it because why on earth would they?
Longer explanation:Like I said earlier, Udoka is a member of the NBCA, which means that the nuts and bolts of his contract (and every head coach's contract) are largely the results of how good his agent is (Monty Williams must have a
very good agent, judging by his deal with Detroit)
and the existing arrangement between the league and the coaches' union.
Given the realities of the NBA, a professional sports league where teams exist in inherent competition to the mutual benefit of all players and organisations, there's little reason for the ownership to press for any variation of a non-compete clause to this degree -- because there's almost no way the union, the coach, or the agents who represent the coaches would agree to anything like this, as it's essentially an untenable situation for coaching staff.
So, from ownership's side:
1) It would be wasted good will in labour negotiations for ownership - especially as they have some say about inter-franchise movement of their contracted coaching staff anyway. If they want to retain their coaches, they can.
2)It's actively detrimental to the smooth function of the league - in this specific case because head coaches tend to want to hire their own assistants anyway, which necessarily indicates flexible movement of coaches between franchises - since even one instance of a no-poaching language would be Pandora's box, quickly creating a massive headache for everyone involved for little to no benefit. Now, there's some argument that the contract language could be so specific as to avoid these kinds of far-reaching implications, but that would be a massive waste of time, especially in light of point 1.
Basically: the pool of available coaches is small enough as it is, teams don't want to make it more difficult for themselves or their head coaches to hire the people that they want to hire.
edit for any completionists: the coaches' union side is pretty straightforward. They're advocating for the best possible contracts and opportunities for all the coaches in the union. Why would they voluntarily agree to this?