With your logic, then every single game out there, even Chess would be random, because hey, life’s random as well and for example you never know how good your opponent will be and if he’ll guess right and catch you off - guard with one of his moves, etc. and luckily win the game.
RNG/Randomness in a game should be directed by if the actual systems and mechanics of a game contain the element of lack from a forced and technical stand point.
For example, the most major for of RNG out of the bunch in Overwatch is its random weapon spread, which is also one of the main reasons why games like Fortnite will never be considered as true e-sports.
So, as in any shooter, the player can get lucky by himself and get a flick or a tricky headshot, but it’s much different in games like Overwatch, where that element of luck exists in the design itself and is system - induced, compared to CS:GO on the other hand, where there are non - random and learnable spray patterns of all weapons.
This is a very important distinction between these two forms of luck in games in general that we should stop conflicting them with each other already…