It's indisputable that glossy displays have advantages over matte displays. It's also indisputable that matte displays have advantages over glossy displays, most importantly, fewer reflections of ambient light. The choice is a tradeoff.

A sentence in a PR that highlights an indisputable advantage of a glossy display does not position glossy as being superior overall but merely superior in the respects mentioned, which is not controversial.

Moreover, Apple continued to offer a matte display in the MacBook Pro for years after that PR, so why would they sell an "inferior" option?