Why wouldn't we? Because one 7-foot SF who shoots the lights out is better than two?

Plus, Ingram will probably never be as good as Durant, but his best shot at being close is to practice with KD and emulate everything he does. I can't imagine a better thing for Ingram's development. Plus, it's not like they can't share the floor - Ingram might not be ideal for guarding SG's, but then again, what SG is going to be able to guard Ingram?