I don't know. They won a Championship, but if Thompson and KD werent injured would they have won? And do people think Irving and Leonard would have been on the same page if we were to had gone after him.
Plus they gave up an older player who can't shoot threes, and we would have had to given up Brown, who is going to be more cost controlled over the next few years, or can be part of a bigger package near the deadline to round out the team, where if we had Leonard, we'd be out a player, and probably money.
It's always easy to say "yeah I'd make that trade for a championship" when we know the out come. But that could have been a bad trade if Leonard doesn't hit that shot, and Thompson and KD don't go down.