You assesment lacks persepective IMO, it's riddled with holes and untruths. The Kings need a lot of things, not just a franchise player Hayward was a Max player in the west on a good defensive team and his teams were always just pretenders, it takes more than a franchise player to cut the mustard out west, you need to play the game well in all facets to compete. Mo could be on of the great shotblockers, he will improve immensely in his first few seasons, he can help the kings in areas that cost MAX$$$ on the open market in free agency.
If WCS can smoothly transition to defending PF's well the kings will have a formidable frontline that can deter even stars. The defense would improve drastically, and the kings have a big chunk of capspace to buy a big peice at SF.
For a teenage kid with 7'10 wingspan his shooting touch is promising, shooting is the easiest skill to improve and he's got a good foundation to start from and soft touch he could end up a solid 3Pt%. And 80%Ft shooter.