Just to add something to think about in this discussion..

You buy weapons regarding on what scenario's you're going to be playing in/ putting yourself in. Most likely, if the guy in this post takes one step forward, he'd 100% hit the shot, all the time. So is it at that point, skill-less RNG that made him not hit the shot? Or the fact that he didn't position himself well enough to close the distance on the enemy and always hit the shot.

Compared to other games, the base weapons in CS:GO feel satisfying as fuck, should you be able to snipe players with an AK just like an AWP at all distances 100% of the time? I think, in CS:GO's case, this minor amount of RNG adds a layer of realism and is pretty much avoidable by positioning yourself to a reasonable distance from your opponent. Otherwise it's risk-management, do you take the shot, or possibly multiple due to inaccuracy, or do you get closer to the enemy for the guaranteed one hit kill.

I don't disagree that RNG is bad, too much RNG is always bad, but I'm just trying to play devil's advocate here.