Let me double down on that:
The "GM-Side" is saying, that when a GM and Player have two preferences that are incompatible, e.g.
Those should not play together.
- wants to play evil PC vs no evil PCs ever
- wants to sex up all the Tavern Maidens vs. no akward sex and flirting in my campaigns
- Tortle lover vs. Tortle hater
This is about a situation, where a compromise is not possible.
And not playing together is actually a win for both, because they are incompatible at the table. Playing together would be a loose situation
This is not about a sitiuation where a compromise is possible. This is about red lines in the sand, that shall not be crossed.
A GM with chelonaphobia should not play with "I only want to play a ninja turtle!"-guy.
A 12 year old DM should not play with 34 year old horny bard guy, who hits on his mom in front of him.
Some of those red lines are irrational or don't make sense to you. But especially when they don't make sense to you then you should not play together. And that is a "win"!
Note how you have made 'I want to play race X' the same as playing an evil PC, or making the game some sort of awkward sexual harassment experience involving children, or triggering the GM's phobias.
It's almost like you know that 'I want to play race X' is a difficult thing to object to unless you exaggerate it to something much worse.

