Wrong analogy - you hired a contractor, with a specified scope of work.

The right analogy is you hire a full-time handyman (whatever go with it), and you come home to find them on your couch in the middle of the day, their excuse is I fixed the dishwasher, and your response is likely to be “I’m not paying you to sit on the couch, go change the ac filters, fix the garage door, and re-seal the deck”