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?

In one quote they used glossy to describe it. How does that mean they said that glossiness made it better?

The other quote is just a list of ways in which the screen is better.

It is YOU that is conflating these and saying that this list of improvements is down to glossiness, not Apple.