I gues it's unreasonable from Kawhi's perspective.
His uncle is his father figure, he was close to him and his mom after his dad died, he helped Kawhi when Kawhi was a nobody...It's not that hard to understand that Kawhi feels he owes his uncle.
Doesn't matter what some fans think here, Kawhi's not stupid. It's likely he already knows he's paying a high price for keeping his uncle on his group, at the same time he could think that most people will forget about this weird episode of his career if he has a great season again on some East/West team.