I don't see where it's implied that **** has the certain knowledge and dedication to gaming at large. The urban dictionary definition makes that statement, but I don't see it there. It actually states that there are many subtypes of **** gamers which implies to me that there are much narrower groups of ****, possibly dedicated to a genre or particular game stream.
I see it the same as anything else. I lift weights but I wouldn't say I'm a hard
core lifter. I don't have an in depth knowledge of all the different lifts, grips, equipment, personalities, etc. so I wouldn't compare myself to a person like Arnold Schwarzenegger. Not only that but I don't have a passion or dedication to it.