It has not seemed to me that folks calling for compromise are actually saying "my way must win".
They are instead saying "you can't piss on my trouser and tell me it's raining."
Imagine a robber-baron "compromising" with someone he's stealing land from by saying he'll hire her, at a wage well above entry. From his position, he probably thinks that's a generous offer, he is after all agreeing to an employment contract. But from her perspective, this is a man trying to get her to be okay with him stealing her land, and buying her off with an above-minimum-wage job. That's not a compromise, even if one side thinks it is. If the robber baron has the power to unilaterally just make this happen, that doesn't suddenly make his proposal a compromise when it isn't.
An actual compromise would be the man agreeing to pay a fair price for the land, and her accepting that genuine offer, then they go their separate ways.
In a similar way, being told "well you can't play a dragonborn, but you can come from the Dragon Clan of barbarians and call yourself a 'dragonborn', but you'll be human" is not a compromise. And yes, that is a real example actually floated in a previous thread like this, from the pro-GM side. A "compromise" sincerely proposed, but clearly with the awareness that it would be rejected....something that was characterized as unreasonable, petulant demands from a player.
So yeah. There's a great deal of talk of compromise. I find most people on the "GM empowerment" side are very prone to proposing false compromise that barely even pays lip service to what the other side wants.
I disagree. I see the same false compromises on both sides.
In your example of the dragonborn. We have three options, "No, play something else," "I must play a dragonborn" or some compromise. This is really a straight forward starting position.
First we start with "play something else." That isn't a compromise as is. Neither is "I must be allowed to play a dragonborn." Both require complete capitulation. Same with "Let me play a tortle and this is how you can include them in your world," and "Play an approved race and Ill make the game fun." It's false compromises all the way down. All of these require copitulation.
Your example, "you can come from the Dragon Clan of barbarians and call yourself a 'dragonborn'" is a compromise. It is giving something, the word Dragonborn. It is a DM favored compromise, sure. But it is a compromise under the definition of the word. It's a compromise many players would take, in my experience.
Another compromise might be "you can have scales on your skin, but you'll be called human or elf." A third might be a lizard-man with dragonborn mechanics. Each of these are somewhere on the spectrum of compromises. Each has both sides giving something and getting something.
Looking back on this thread, I see none of these compromises, nothing close. Everything is either A or B. It's either "tortle" or "no tortle." No discussion as to how to give someone what they want from the tortle, while keeping the worldbuilding intact. Nope. No discussion that we should have the discussion at all, that talking is required. Nope. Nothing.
If people wanted to compromise, the answer to the question "Why do you want to play that?" wouldn't be "I just do, or I walk." And the answer to "Can I play a Tortle? Wouldnt be "No, its not on the approved race list, take a walk!" Both are simply demands of copitulation.
So no. All I see is a binary. A binary presented while screaming the word "compromise." A binary each side has now told me isn't a binary.
I think the better way to approach the situation is to ask the other side "Whats important to you," and start from there. The answer will tell you if a true compromise is even possible. If the answers are back at the starting position, I guess walking it a good idea for both.