I'd rather fly than go by car. Gas stations and rest stops are far more rona tainted than an airport or airplane.
I get what you're saying, but you don't really need to go into a gas station, and if you do it can probably be less than a minute. You can get meals in drive thru's or plan stops at restaurants with outdoor seating.
And I'd take a gross open air rest stop bathroom over an airport one. Granted I haven't been in an airport since March so I don't know how crowded they are now but a lot of them just smell like stale piss which makes me think ventilation in them isn't always the best. Plus you're probably in an airport for at least an hour, on a crowded jetway, maybe there's a shuttle for a car rental, etc. Just a lot more opportunities for transmission compared to driving.