This is something that I completely agree with. It used to be that people said if you where a gamer than you were a shut-in with no friends. But we've come to the day and age where most people enjoy playing some sort of video game. So it's less of an exclusive activity and more of an inclusive activity now.
This question largely matters whether or not you count online friends as such, which can be just as real as friendships you have with people you can physically meet and spend time with. Even though such friends may not always be able to ever meet up later in real life, many do manage this.
If you don't count online friends, then the answer is possible yes. A gamer might have fewer friends. Even then, many gamers have plenty of both 'in real life' friends and online friends and can keep a strong and healthy social life. Personally, I would very much count online friendships as real friends.
Especially if, like me, you cannot always go out and socialize, not as much as I would like. So I depend on my online friends for my social needs.
I think that depends on being able to socialize in which owning a gaming console or pc are a factor. Since I live in a country where there are lots of gaming shops despite not owning a gaming console or pc, I made a lot of friends along the way.