The chances are small but the unmentioned reason is not the only way.Isn't Mikal older than Booker by a few months? Mikal has a lot of catching up to do. The only way that could happen is inj . . . nah, not even going to say it.
Mikal is a better defender and has a higher career TS% than Booker. This season Booker is averaging about 21 field goal attempts per game. Since the trade, Mikal is averaging about 17 field goal attempts per game on elite efficiency.
If Mikal can increase his field goal volume by about five shots per game while maintaining high efficiency, he would be in that conversation.