This is probably a stupid question, but why is mail in voting seen as secure when online voting isn't? I mean, obviously the latter is less secure, since you do

This is probably a stupid question, but why is mail in voting seen as secure when online voting isn't? I mean, obviously the latter is less secure, since you don't know how the votes are counted and can more easily change the results en mass. But shouldn't both have the same issues with things like voter coercion? Did we suddenly decide that isn't a risk at all?