Yes! The Wisconsin stats are truly dismal AND getting worse!! I wouldn't fault anyone for making the sane decision to not participate. Doing the ride itself would be reasonably safe but doing any of the ancillary activities like getting pizza or having a beer in a bar or restaurant would provide way too much exposure to the selfish A-holes that can't bring themselves to do the "right thing"!
I do ride frequently (~3 time a week) but almost always solo. I don't wear a mask while riding but have one in my pocket in the event I need to pop into a KwikTrip for a snack .
I'm going to keep that day open tho and if it's really nice i.e. not raining, snowing and is relatively warm, I just may show up. If no one else shows, no big deal, just another solo ride .