Are 75% Crit Builds viable?

As stated in the title, are 75% CR builds viable on ADC? The reason I ask is that due to how LoL handles crits, you are driven quicker towards a mean CR of whatever your crit value is. If the game calculated crits via a pure rng roll, I would better understand 100% CR, as it would up your consistency.

I do feel the need to add further clarification, as I feel that if your champ has internal synergies with crit or preforms a lower number of autos, I think 100% CR is very justified. Caitlyn and Jihn building 75% sounds like a terrible idea. This probably better applies to high auto attack frequency ADCs. There are also items that specifically want 100% to maintain higher uptime, Quickblades comes to mind for me. But, I’ve been thinking for some time that 75% CR builds might be better, particularly if you have a lead. If you have a lead, you’re likely dealing enough dmg to murder folk. But, if you only build crit, especially without shieldbow, you invite the enemy to have a massive swing play to get back in the game by CCing -> killing you. There are plenty of bruiser items that will still meaningfully contribute to your damage while giving you a bit better sticking power in fights. Items like Wits help vs magic heavy teams, and doubling down might help even more.

Just food for thought. More than welcome to being proven wrong. This might be a Low Elo Larry take, I’m sure peel gets better in higher elo. Maybe a team comp thing too, if you need to be the one to deal with a super tank with 100% with LDR/Mortal probably wins out. But VS more squishy, burst oriented teams… idk. Some survival is definitely tempting.

LoL is a very context sensitive game, so blanket statements are bad, but should I go 100% CR 100% of the time?