I feel like this is a completely different area though. Would you ever rent services from someone saying: "I'll do the work in your house, but you can't look" ? I get the general idea of "I don't waive my right for privacy when I enter someone's house", but for work I just don't see any use case.

If I can't see what you're doing in my house, you're not working in my house. What's the reason I'd ever want/need the opposite?