Camouflage is not a physical trait. Even if you're good at using it, it's something you either have, or you don't. Just because you have 100 sneak, this does not mean you're suitably camoflauged at all times. If I'm standing five feet in front of someone while wearing glistening Elven armor on a bright sunny day, does that mean I'm camoflauged? I can wear whatever I want and it will count as "camouflage" because I'm a really sneaky guy?
I'm doing nothing of the sort. In fact, most wouldn't.
But they're still detected. They're just not causing a panic.
Look, you initially said that at 100 sneak, you shouldn't be detected in broad daylight. I disagree. Whether or not an NPC cares or not that they've "made" you is another matter entirely, but they should see you unless they're totally blind.




