That's right, I said it!
You really think the guy that is the 3rd option on a great team is more deserving than the guy that has defensive game plan drawn up to stop him every night?
I don't really think that "deserve" has anything to do with it: nobody "deserves" to be an All-Star. Donovan Mitchell earned an All-Star selection, so did Klay Thompson, IMO. Thompson got it, and Mitchell didn't. Them's the breaks.
I guess such is life playing in a small market. Its no wonder that all the stars try to get to bigger markets.