I agree. They are getting coached and pushed. You think if Brown was the Larry Bowa of basketball they'd be better players? I think it's probably the opposite and they'd be worse.
Brown may not be the guy to fully unlock their potential at the level of a Phil Jackson but he is also the guy who has led them, and the Sixers, to great heights so far. And it's not his fault he's had neither the right roster nor the same roster around them, even if he could maybe adjust his system better.
I think Marcus Hayes is mostly right about this though - it is ownership that empowers Joel and Ben, in a league where the players already have most of the power. It's their team, not Brown's, and not Brand's. It's rare to find a coach that can rise above that (and also takes a really good owner and GM to get and empower him). LeBron and Kobe and Magic and Kawhi all had great coaches but mostly they were self-motivated. Ben and Joel, so far, don't seem to have quite that same level of insane intensity and maybe they never will. But again: they're still kids.
For sure, they conversation will change if they actually make a run at the Top 4, and even more so if they actually knock off Milwaukee (regardless of round). It's not gonna be easy but it's not all that far-fetched. We'll see what they are coming out of this break.