Well, the facts are simple:
Kamala Harris did not run on identity politics. She did not campaign on trans people. You know who keeps talking about them?
The GOP with 665 anti-trans bills this year alone.
She didn't run on being a woman. She didn't run on her race. She didn't mention Latinx.
She objectively ran a more right-wing platform than Biden. That's not an opinion or up for debate, that's literally an easily provable fact by looking at both campaigns and comparing them side by side.
She paraded the Cheneys around. She ran on "the most lethal military in the world". She promised to have Republicans in her administration. She tried very hard to court moderates and conservatives, while shunning progressives. She actively ran towards the middle and she lost all swing states for that. So much for "cOmMoN sEnSe".
People who try to throw progressives under the bus right now for Harris running an objectively more right-wing campaign than Biden in 2020 and losing everything (something that needs to be repeated ad nauseam to defeat this right-wing framing of her being too liberal) are the same kind of people who were screaming bloody murder back during the Civil Rights movement. Change is not easy and takes time.
In fact, if you look at actual data and evidence from polls over the years it is overwhelmingly clear that the majority of Americans believe trans individuals should be protected from discrimination. Most Americans don't care about trans people to spend every waking hour thinking about them, because they are a tiny minority that don't affect their lives in any way. Having a gender neutral bathroom in a bar isn't going to change what's currently happening. On the other hand, banning such a bathroom won't lower the cost of eggs.
There's nothing "common sense" about capitulating to the right's framing of these issues. Look at the Democratic party. There are barely any "ultra progressives" there, especially when looked at from a global POV. The Dems are center-right. If they're supposed to go further right and ignore all social aspects (which, as the data shows, are actually pretty popular when not paraded as boogeymen by the right) then what's the point of having the Democratic party in the first place? Might as well keep the GOP and forget about the Dems, since trying to out-Republican the Republicans will never work.