@Koochi-Q Yes, and speaking from a perspective of an UI developer who has done very similar features in behavior.
Also, when I started playing Apex, my mouse default sensitivity was double than what it is now. If I go back to it nowadays, I get really dizzy (and I don't mean as good as the pro player, heh) and can't hit a still target if I move. While turning off aim assist wouldn't actually nauseate console players, it would make them feel like their target is "slippery", mostly overshooting and having hard times tracking the enemy for a couple of hours / days, until their brain adjusts. Decreasing sensitivity multipliers for ADS can make up for disabling aim assist, console players that do this and have great aim (are on point with their tracking and switch between hipfire and ads on every shot or burst) probably don't feel much of a difference.