I'd rather have Mikal than Bamba as well, but that's on the basis that Mikal projects to be a very good 3 and D player that can play SG and SF. In today's NBA he can stay on the floor at crunch time in the play offs whereas Bamba would be riding the pine if he doesn't develop offensively (unless of course we follow Utah and keep our big on the floor).
The other reason I'd take Mikal is it would fit with what we've got here. Mikal, Isaac and Gordon would be pretty good defensively and in small ball can all slide up a spot to SF PF and C to allow other shooters onto the court. In normal line ups having them at SG SF and PF gives us a good core.
Mikal has a high floor as a 3 and D guy, so he's not ideal at 6 but he's a very safe pick whereas Trae Young carries risk because of his size, Bamba might never develop offensively and although he should be good defensively those types of bigs aren't playing prominent roles in the play offs, Sexton is a project shooter and if he doesn't put it together he's Payton mark II, and Carter is a decent all round talent but if he doesn't take his skills to the next level he could be another O'Quinn. So other prospects with potentially higher ceilings might not offer the same floor as Mikal.
Also, if Mikal develops offensively he could become a potential all star. So he's not one dimensional as many think because sometimes players like this surprise us (e.g. Leonard).
Ideally we want a star at 6, but we could do worse than draft a high floor guy like Mikal and bet on him being the next Butler or Leonard unheralded pick.