Agreed. The Oxford comma is superfluous in a list of adjectives.
If you’re listing adjectives that modify a single noun, there is no ambiguous regrouping of those adjectives that can change their meaning. They all still modify the noun. If you are listing nouns, as in the popular “strippers, JFK, and Stalin” meme, then there is room for confusion and the comma helps to clarify.
Regardless, if the intent is clear, it’s a silly rule to get nitpicky about. Fuck the haters.