Not all owners are strict. When Covid happened, I had three reservations rented out. One person managed to go anyway, for another I rescheduled their trip. The third lived in Germany so it was impossible for them; I re-rented the points for the lower going rate at the time and returned those money to the renter. They lost $3 pp rather than everything.
In my rental contract I write I would try to move or rent the points, but I also write it's subject to availability and I write when the points expire.