For one, you could play the 7 foot huge guy at center instead of using a much smaller 6-8 1/2 guy or steve kerr just because hes 6-10.
Post players have to be able to defend bigs, defend the rim and rebound. Steve kerr and 6-8 ayers do not do any of these things but they get all the minutes. Predictably, ayers got abused, finishing with zero pts, zero blocks and 1 rebound. Baynes, although raw, makes much more sense at this position as he actually has the size to do the things required of a post player, as well as some offensive ability.
Yet pop stubbornly sticks with ayers and bonner.