Lol calm your g-string!
1: I check and top up the air every so often, I don't always have the car keys to hand and cba going in to get them, take out the car's own 12v pump from the boot, plug it then wrangle around with a cable as I switch between sides etc.
B) It weighs a little more than 2x 18650 batteries, really not that heavy, it's chunky because it has an inflator pump inside. Besides, it stays in the shed and not carried in my pants pocket. Already have massive bulk there anyway, don't need another.
iii} I like the quick convenience of everything being wire-free, Android Auto? Wireless. Charging my phone? Wireless. Pumping up tyres? Wireless.