The thing about Mara for me is that he wasn’t even the second best player on his team. Part of that is because Yaxel and Morez are really good but I still don’t know why we’ve decided to start projecting every single 7’2” and above guy as a potential Wemby stopper.
He's a pick that makes sense in the late lottery to early 20s. Someone will probably draft him higher and be disappointed, but he fills a niche and ought to be valuable within that limited context.
He may not be able to guard Wemby but that's fine -- I think you're right that the game plan for him will be to overpower him with strength. Or at least get him off-balance and frustrated. It may sound counter-intuitive, but the reason I want a player like Mara is to help out with the three-point defense. We're constantly collapsing to stop drives and wind up getting killed on the perimeter because someone is always left open. If Mara (or someone like him) can stop the free path to the basket for everyone who is not an enormous French basketball prodigy, then we at least stand a chance of scoring enough that Wemby can't beat us on his own.