I feel like you're misunderstanding what it's like to be inside a vehicle. You're not exactly at ease, there's hardly any space, and your biggest regular threat is hitting your head one something the engineers forgot to pad. Your hands and feet need to maneuver just so to get into position to do their jobs, and physical dexterity to operate keyboards, switches and fix problems is at a premium.
You suggest that, in this cramped space, where you might need to reach into restricted areas, wearing power armor with extra bulky plating is the way to go.