I feel that style of player only works when you have guards who can do the bulk of the scoring, and since scoring is the most important aspect of the game, I feel Ja is accurately viewed as the team's best player.
I hear you though, I feel it's similar to how some say Sabonis is the best player on the Kings and not De'Aaron Fox. They're the anchor of the team, but then you look at what Fox did last night and it's like....nahhhhh Sabonis not doing that