Your original logic states:
If you draft Player A he should play position A until he proves he can't and only then should he be considered for position B.
Yet Alontae was drafted as a CB, proved he can play CB but you are suggesting he'd be the player to move to position B.
In other words your logic makes sense as to why you wouldn't move Kool-Aid, it does not clarify why you decided Alontae would be the player to move in that scenario. Is it because you'd rather ask a veteran to move vs a rookie?