Hang on, that's not what it said!
"They (blank nails) are often called elegant or tasteful and these (terms) are often usually euphemisms that perpetuate white supremacist standards of beauty.”
Later in the piece, Rodulfo was quoted again as saying: “The examples are almost always white women or celebrities … [and] they’ll often conflate class and taste with that bareness.”
I think it's quite clear that it's the conflation of white beauty standards with elegance which is being called out!