Luke Walton has already been hired as the Los Angeles Lakers' next head coach, but he still has to finish out his current job as a Golden State Warriors assistant before starting his new one.
Not a lot of people could begrudge him for fulfilling those obligations, because not only did he make a commitment to Steve Kerr and the organization, but being on Golden State's bench as they make an attempt to repeat as NBA champions looks like it would be pretty fun. That is probably why Walton wouldn't hold it against Shaw if he wanted to fill the vacancy he created there, and it sounds like that is exactly what Shaw hopes to do.