I definitely understand your frustration and where you’re coming from. Personally, I scarcely use big lips on white characters if I know they wouldn’t logically have it.
For me, I write POC characters ALL the time. From African American, to Middle Easterners, To Hispanic/Mexicans, to North Africans, and everything in between, so it’s nothing out of the ordinary for me to use features that are accustomed to those groups.
Often, I look up references of these people from these groups to give myself a general idea of what they should look like. I feel like if people started putting more effort into developing the character’s background, maybe they wouldn’t have to find the need to put those kinds of lips on the MC and turn them into a character that looks like every other MC.
That being said, that does not mean I don’t have a white character with big lips, because again, white people can have big lips, but it’s just not that common. 