He's writing a,
poem.
Your sideview mirror is just fine. Because you are not going to drive the same way with your arm there and because you still have the option of retracting it and because sideswipes are already unlikely all add up to make it extremely unlikely your arm will get hurt.
Fair enough, I try to NOT use my AC as much as possible, I live in a hot, muggy state (FL) and IMO a person needs to get and retain acclimation to the climate your living in. Car AC's for some reason or other never seem to last the life of a car and repairs are expensive, so I only use mine when I'm stuck in traffic and it's 95+ outside..