I never had a problem removing them from phones and iPads, but I never had to on a camera. But I wouldn’t worry, as when/if you resell you can tout the protector as a plus point. If someone mucks things up by removing it, that’s their problem!
But... as I mentioned before, I have never known mold and fungus under a phone screen, but I have seen it reported under a camera screen. Maybe it’s because in reality we hold a camera closer to our face much more than we do phones?, but more likely because camera manufacturers probably regard the LCD screen as a necessary evil, and haven’t mastered isolating it from the environment.