Everything above, plus he should be able to run his games and make rulings at his table however he wants. Nothing about that makes him a obtuse or a buzzkill.
Never said he couldn't. Just said it sucks. Everything about his approach makes him an obtuse buzzkill imo. Obtuse meaning ignorant, and buzzkill meaning he who ruins people's fun for the sake of it.
The first two paragraphs, of the first CRB, in the section on selecting a species, use language like "billions of worlds" and "unlimited possibilities" as well as "the only limitation is imagination". This is what a PC reads and then Capt Party Pooper comes along with his Phasers set to "NO" and won't even have a conversation? Sorry you can think what you like LD, I stand by obtuse buzzkill, he is pouring a bucket of urine on his PC's heads for the sake of it, because the CRB is telling him the exact opposite.
Ima an obtuse buzzkill who sucks, that's a new one.
Let me quote you something from the CRB under Recruiting Players pg.288
"...Gms and players should try to recruit others that they get along with and mesh well together. It's helpful if they enjoy similar play styles and have similar expectations about the game and how it will be played"
Sounds like at your table as long as it's your play style, otherwise the answer is no.