I wear my mask indoors everywhere but not outdoors, but I don't go near crowds.
Yes, risk of infection is low. Yes, risk of severe infection is even lower. But it's not zero, and I always err on the side of caution.
Variants are the issue. Also, it's now being reported that vaccinated people are spreading the virus to unvaccinated. I'm responsible for high-risk (though vaxxed) senior adults, and unvaxxed children, so I feel it's my responsibility to do what I can to keep them safe.
I don't mind wearing masks, so it's no big deal to me anyway.