I think the take is a homerish take. Lillard took a team with zero expectations after a devastating free agency, assumed the mantle of unquestioned leader in a vacuum in a more competitive conference and got to 44 wins and a playoff berth.
I don't disagree with this characterization, but I think you could easily make a case that Boston is a 30ish win team without Isaiah. They'd be completely sunk on offense.
Look, I find this all a little silly because all of us seem to agree that Lillard is better. In terms of stats, it's surprising to see that Thomas is actually relatively close to Lillard. But if you go beyond the stats, Lillard comes out ahead.
I just don't agree with the sentiment, "No contest, Lillard is SO much better than IT," which is how I read Moranis's posts here.
As for defense, I'm going to disagree that the stats do Lillard an injustice by rating him worse. Lillard still has a ways to go defensively. Thomas has inherent limitations that will always prevent him from being a plus defender, but I think his effort and focus are better than Lillard, and given the way the Celtics team defense works (i.e. everybody has to be locked in), I think it's fair to give Isaiah credit for the fact that his team is far better defensively. It's not like he's got amazing shot-blockers prowling the paint behind him.
We can argue about how Lillard would perform if he happened to be on Boston, but I don't know how we can ever really "prove" that. Probably he'd be even better than he is now if he were on the Celts.
On the other hand, the Blazers are a pretty well coached squad, and have more shooting.
Anyway, I'm focusing on present results, here. I think it's really impressive and surprising that Isaiah has been able to thrive in Boston to the degree we've seen.
That there is even a discussion to be had here, even though I think reasonable minds will ultimately agree Lillard is the better, more dangerous player with higher long term value and upside, is remarkable to me.