For people who are confused by the concept of an aim community: it's something that's mostly developed because of aim training. Pushing scores, teaching each other, motivating each other to improve, and posting montages/vods to track progress. Because the community has pushed this one specific skill so far, we have a lot of info about what effective technique is, what works at a high level, and how to translate that skill ingame.
Top professionals in esports titles have come to people within this community for aim coaching due to this level of specialized knowledge. People like Elige, Twistzz, StrafingFlame, Mel, AvovA, and Jinggg have been coached by people within the community who primarily play aim trainers.
But generally people who are interested in aiming as a skill and spend a lot of time practicing it (often over other skills), usually are around the community too.
It's like how in a fighting game you'll have broader game communities, and then niche subsets of communities dedicated to techskill or pushing the limits of a specific character.
It's not an exclusive club or anything, but it's different from just ever having aimed before. Pushing the skill is more like a hobby for people in the same way that rhythm games or speedrunning are.
I've been around the aim community for 5 years now. rileycs is NOT cheating, and here's why.
I talk about the rock clip and address common arguments for the first 8 minutes and the rest is about how aiming has developed as a skill in the past few years.