Yeah. One of our other neighbors ran a tutoring side business out of her apartment, which was technically illegal but of course didn't bother anyone and went unnoticed.
Often times you see rules that are broad, but really intended for a specific thing. Like the example you gave, making it illegal to run a business from a private residence. That rule was never intended for the tutor, it was intended for the noisy neighbor running a mechanic shop out of their garage.