Sometimes it's just easier to keep the mask on when walking between places. Personally, I have longish hair so it's kind of a pain to don/doff if I'm out and about. So I'll wear it in the car sometimes.
Seems like a lot of folks assume intent in people's actions, maybe because it's easier to make fun of others or push a certain narrative. No, I don't think Covid is going to get me in my car or when I'm walking outside away from people—I'd just rather keep my mask on because it's annoying to fiddle with.