If I engage a lawyer, a plumber or an electrician, the contract will normally provide for payment by the hour and, if the work wasn't done, I would expect a commensurate refund.
That's a bad analogy for higher education. Lawyers, plumbers and electricians are doing a specifically contracted piece of work. Without their labour, the work cannot be done. You just wait around.
A better analogy for university is gym membership. You pay to get access to facilities, equipment, pool, personal fitness programmes, assistance from trainers, etc. Then you do as much or as little work as you want with the tools you are given. You won't achieve your goal of getting fit unless you work, of course, but how much you do, and how much you engage with the trainers, is up to you.
So then the trainers at your gym go on strike for a few days. The gym stays open, and you still have the fitness programme they designed for you, plus access to all the equipment, facilities, etc.
Would the gym refund the portion of your annual membership fees that relate to the hours you might have spent with a trainer? No idea but I'd be surprised. It would also be a pretty minute portion of your membership fees.