Well, as far as I know, it's a state committee decision, and I know state committees can be full of snotty, smug RINO double agents. Kick their @$$ out.
Maine has its problems, but it doesn't have open primaries.
In California we voted on it a few years back. I was outvoted by my fellow Californians, but there was not one peep on the matter from the Republican party. They couldn’t have cared less.
We now have open primaries.
Does the party try to advocate for closed primaries? Do they advocate for it in states where the primaries are open? Do the states with Republican governors become active on this? No.
The party gets just the results it wants, Leftist Republicans nominated for office.