Certain champs need to be unaccessible in ARAM
There are a few Champions that are downright broken and should not be playable in ARAM. Like Heimerdinger for example who turrets are used in summoners rift to establish lane dominance, in ARAM however there is only one lane, therefore it becomes nearly impossible to even push lane. Another example would be Karthus with his ultimate, since fountain healing is disabled in ARAM, Karthus doesn't even have to wait for the moment to strike, he merely has to activate it every time it is off of cooldown and his team wins. If Riot can restrict champs on extremely loose, carefree gamemodes like URF then they should be able to on more serious gamemodes.
is a lie.
lets you completely ignore it. Plus health regen is a thing.