On one hand, I'm moderately impressed they proactively gave you any points in a timely manner -- without asking.
On the other hand, someone else's blood stained on the sheets upon my arrival warranting 2000 points does kind of seem like a back-handed gift.
I don't think you'll end up with a happy outcome if you pressed the issue. I haven't had issues like this before, but I imagine the process to get the amount of points required for a free, peak season night at that property won't be a quick one. I'd probably just not stay at that particular property again. Glad that they're taking COVID precautions seriously, but there are other health/sanitation requirements to still be fulfilled.