Riot has posted about this many, many times over the years:
- Crit in League of Legends is NOT "luck-based". It is NOT even RNG. It is pseudo-RNG and there is a massive difference.
Everyone seems to think "If they only have 10% Critical Chance, then each shot only has a 10% chance to crit" and they get angry when that crit goes off because they view it as a low-chance BS thing. This is completely false if you know how the game engine works.
Using League's PRNG system (just like DOTA's), if you have 10% Critical Chance then your first auto-attack has less than 10% chance to crit and every auto-attack that does not crit raises the chance of the next auto-attack being a crit until you get a crit, then it resets. This means that having 10% Critical Chance will get you a crit roughly 1 shot in 10 pretty consistently.
Yes, just running a single Critical Chance rune will give you a guaranteed crit eventually - all the more reason the runes need to go so you actually have to invest in crit items.
- "Why don't we make Critical Chance just double damage every X attacks???"
Because that's already how it works for one thing. Riot has stated repeatedly that they like crit not being 100% predictable because it makes interesting things happen and prevents horribly abusive gameplay.
Imagine if
could buy
then just auto-attack minions X times then Q you in the face, knowing that it was a guaranteed crit every time like clockwork. That sounds like so much fun right?
- Critical Strike has "zero strategy, skill, or brain activity".
This applies to basic attacks in general. What "skill" does building AP to do more damage show off? Is there any mechanical skill in building tank items and relying on inherent CC/base damage to do things? There is zero micro decisions to be made on most items in the game - it's all just macro decisions of "what items let me do my job best?"
- Critical Strike has no counter-play!
Again, neither do basic attacks in general. They are target, resourceless, and have almost no cooldown. Marksmen and Mages can even use them from a safe range.
tl;dr - Critical Strike in League is just like
Loaded Dice passive, emphasis on "Loaded"; just because you get different amounts of gold every minion kill doesn't make it random. If you last-hit every minion in a wave you will get the same amount of gold every wave. If you buy X% Critical Chance you will get a certain number of crits every X auto-attacks but you won't know ahead of time which ones they will be. If you want to crit more often, buy more Critical Chance. Since most crit builds give 70+% it's hardly random by mid-late game.
If crit needs to be removed from laning, then remove crit component items like
and make it only a stat on completed items.