(Serious):
I think the word "Gamer" has, over time, ceased to be a dirty word and is now just a label.
It no longer conjures up images of sweaty, overweight nerds in a basement, huddled around a console, doing the typical nerd tropes.
Snorting with laughter, pushing up their glasses with one finger, acne-covered skin, etc. You know, the old misconceptions.
I believe it now simply means you play video games. Anything from the latest game... like the 496th re-release of Skyrim for a Keurig coffee maker
To a mobile phone game. Yes, I don't really consider mobile games to be "games" so much as cash grabs, though not all of them are. But on mobile, there are more waifu gacha games than actual games.
However, I don't think being labeled a "gamer" is a dirty term anymore. It really just means you play video games more than someone who only plays a phone game during their commute or a taxi ride.