From a statistical standpoint, there is zero validity to your opinions. Let's talk about assist percentage, which is the percentage of teammates points that are assisted when Sexton is on the floor. His rookie year, he was responsible for 15.3% and it actually went down in 2020 to 15.1%. That is nowhere close to a point guard production. You compare Sexton to Westbrook on several posts, yet Westbrook has more than doubled Sexton's assist percentage for his career, with a career assist percentage of 42.3%. As a rookie, his lowest mark was 27.5%. So while in your mind they are similar players creating for teammates, the statistics produced show they are not remotely similar.
Love had a similar assist percentage at 15.4% in 2020. Nobody would call him a point guard. Andrew Wiggins, who a notorious non-passer and score first player, hasn't had a assist percentage numbers that low in four seasons. That's what Sexton does: finish not set up.
Simply put, no offense will succeed with Sexton as the primary player responsible for setting the table for others. That is not how he plays, and the stats show he won't even be relatively close after great improvement.