Asking about the culture and work environment is what you are supposed to be doing when they ask "are there any questions". I've never had a problem finding a job where I'm expected to work about 40 hours and go home. Once in a while they ask for extra work in an emergency, but that is rare and they have all made it up to me somehow.
The protection isn't great I'll agree, but it isn't hard to find places that don't treat you like that. Don't work for the rest no matter how interesting the job is.
But you might fix it - and if you break it more it was already broke so no loss