What you're buying is not driving, by itself, fully.
How impressive it is depends on where you live.
No, it could not.
I owned a Model 3 with FSD. I own a Mach-E with BlueCruise. They're equivalent for the majority of drives I've done.
Did it also drive itself back to your home empty?
If it's full self driving, then I assume that Tesla is paying for your insurance and taking all responsibility for any crashes it causes in your car?