I'm not sure why you're talking about KAT's offense, when we were talking about defense. Are you saying, KAT, a guy maligned his whole career as a bad defender, is on another level defensively than Ayton? According to your theory, the Blazers would get so destroyed defensively by playing Ayton at PF, because of "the way the game has changed" etc, yet the #1 defensive team in the league features KAT at PF. Clingan IS a defensive center BTW, and has been compared to Gobert.
Offensively, I think Ayton would be fine at PF as he's got a very good mid-range shot, and I also don't buy the idea that PFs must be able to shoot 3 pointers. Ayton would also be a mismatch inside against those stretch 4s.