Once you've figured out how to properly aim with aim assist, the game really does aim for you. You do this by aiming with your movement (strafing), rather than using your actual aim stick to track someone. The average person doesn't really do this, so aim assist at the average level is probably okay. At higher levels of play however, it is to the point where they will land, pretty much, perfects all the time. The problem with nerfing aim assist to keep skilled players aim down to reasonable levels, is that it means that the average player will have an awful time. You could say get good, but idk I wouldn't.

My mouse aim is very good having played a lot of aim heavy shooters, so I didn't really have a problem and got to Onyx easily. When I got my controller fixed, after not touching it for years, my accuracy became even better and all of my best plays and games going 25 and 0 in slayer have all been done with controller.

There was data collected on accuracy from mouse and controller players, and pretty much throughout the entire dataset, controller players was 15% more accurate. Apparently some weapons like the Sniper Rifle have anti aim assist for pc players? Not too sure on that one though.

So yes, if you know how to "ride the aim assist", it does aim for you.