In the US that's fine but it's helpful to be able to drive a stick when you're traveling.

The times I rented/hired a campervan in New Zealand and in Iceland, they were manual transmission. I heard recently the ones in New Zealand are automatic nowadays. (That's good because I wasn't used to shifting with my left hand and was kinda freaked out for the first half hour or so of driving.)

A guy I knew had volunteered on Lesbos during the refugee crisis and can't drive a stick so he couldn't drive there. The availability of rental cars on islands can be pretty limited. A couple years ago I was on Madeira and apparently the only affordable rentals there are manual transmission subcompacts.