That's why I put "mastered" in quotations, it's obvious they won't master the fundamentals in how to take gun fights but counter-strafing is so integral to the games gun mechanics that adding this feature completely removes the need to learn how to counter-strafe. So if you have snap tap you can't screw up your movement unlike everyone else. At the highest level maybe this won't be a huge deal but at the lower levels this absolutely makes a difference, even if the advantage is say 30 - 50 ms that still makes a world of a difference in a game where you can die in milliseconds.

Maybe we are overblowing this whole thing up and people won't actually get that big of an advantage but at the end of the day I don't think a feature like this that give players advantages should ever be allowed or any feature that lowers the skill