The problem with "not all humans" discourse is it comes from the exact same people who would say not all men/white people/straight people and theyre all only engaging in that bc they feel their real life views are being called out which is a reach.
All humans are rotten speciesists because its easier to write. No one cares to read abt human parents of mutant children school council. Claremont took the time to depict pro human mutants but now comics pacing and storytelling is different. It dont have to stick to real life and readers should be able to put enough distance between their experience and the things theyre reading to realize its a fictional story, not a callout post aimed at them.