The auto aim is not that huge of an advantage. I‘m a ps4 player but I‘m playing Apex with some friends on PC sometimes and of course with controller since I‘m better with it than I am with m&k.
First of all, the aim assist isn‘t nearly that every noob just instantly lasers you without any problems. Secondly, the m&k users have a huge advantage in movement like strafing left/right. I can tell you that it is wayyy harder to challenge a pc player in close fight due to the movement. And when you do you most likely have to shoot with hipfire because of his crazy left/right/duck *. And in that case there is no auto aim at all!
I was playing Battlefield for years with auto aim turned off while 99% of the players had it turned on. I had no problem killing all these guys since auto aim won‘t give them game-sense nor is it anywhere like a aim-bot. I always felt that it even annoyed me since i wasn‘t in full controll of my crosshair, for example when i was shooting a guy and another guy would run across the line of fire, the crosshair would be affected. I was way better without it, but it took a while and a lot of commitment. But not everyone has the time and nerves to do that.
Therefore I wouldn‘t care if they would take it out, but I can tell you that you don‘t have an advantage over m&k players. If anything, the m&k guys still have a huge advantage. Especially in a fast moving game like Apex...
If you wanna play without aim assist, go on and do it.