Unfortunately that’s not really how the NBA works anymore.
Look at the good teams last year and they’re all built similary. There are really only pure PG’s and Centers left every other player basically has to be able to fulfill multiple positions. Here’s a quick breakdown.
Boston last year. Kyrie / Rozier their starting pg’s, Horford at center. The rest of the starters all could play either the 2-3 or the 3-4 . Houston played Capela at C and cdirty3 at point the rest of the starters all capable of playing the 2-3 or 3-4. Cleveland kind of broke that mold a bit because LBJ kind of played everything for that team, but GS did the same Curry was their pg, McGee played center and the rest of them played whatever.
Here’s my point, unless you’re a PG or a center, you have to be able to at the very least defend multiple positions. Saying these are our SF's and that’s all they do doesn’t really make sense. On paper I like Aminu best at the 3 but depending on the match up he will need to play the 4.
I think this is actually where I do “understand” the people who complain about CJ’s height. He’s really limited to basically only SG’s on defense and he’s not really capable of switching very well, most 3 -4 types are just to big for him.