Why is it so bad to use the restroom during cl?

I don't get it....we get in trouble for using the restroom. I'm thinking too, what if you get serious urinary tract infection because of it? What if you get bad constipation? They don't think about this stuff, and if they think they're gonna make me hold it in and let me get a infection or busted intestine I'll just soil myself, I'm getting tired of getting in trouble for natural bodily functions....like, they can let us eat, they can let us drink, but not poop and pee. What do you think?