Sure, they could have made it work but if you look at the Rockets salary, it would have required Tari plus a single player salary greater than that of Capela to make the math work. The next player up the list above Capela is Amen and then Reed. No way you were adding either of those players to that deal - period, end of call. The only salary that actually worked for White was DFS (alone). I think it's clear that Ime and his favoring a 5 forward lineup is the reason that didn't happen.
For me, it's on Ime. He's the assclown asking Tari to do things he's not capable of doing (playing the 2). He's the one who's empowering Tari to fail instead of putting him in the best position to succeed which is as the agent of chaos off the bench. Blame the architect of the five forward lineup.