This was my thinking during my recent rental (using a broker, and the only time I've ever rented out points so far). The renter rented right at 11 months out (early February 2020) then tried to back out less than 2 months prior in November 2020. They obviously got nervous about travelling during covid, which I understand, but that gave me no time to bank the points so I had to simply decline. I feel bad they're probably out $1200 for nothing, but those are the breaks. Had they requested to cancel over the summer or even early fall, I may have been able to accommodate.
I realize that even last spring/summer we didn't exactly realize how long this situation would drag on, but you still have to be more proactive than that with things like this, IMHO, and the burden *definitely* isn't on me to eat the loss.