Well so far he hasn’t done anything for Star Wars or Star Trek for that matter. He was a producer on the Fox X-men series and did two lousy attempts on adapting the Dark Phoenix Saga the second of which he directed, and which closed out the Fox X-men franchise on a whimper.
I guess his name is in the credits of Logan and Deadpool and Wolverine and Lucasfilm wants that kind of cachet. I mean look they desperately want Sean Levy to make a Star Wars movie as well.
Hasn’t done anything for Star Wars? You do realize he was involved in the early story stages of TFA and R1, right? He even got a thank-you credit in both movies. He also basically co-created Rebels, alongside Filoni.