in short, yes you want things grounded, as far as death by electrocution,
fairly unlikely, I have shocked myself at least 10 times in my life (remodeling/construction/and dumbasses leaving live wires cut and on)
its annoying as hell, but Im not dead yet.
14/2 lines with a 15amp breaker is what Ive shocked myself off, its fairly safe, i mean dont stand knee deep in water and lick a live wire, but /shrug, even got a 14/2 live wire that was cut off in my basement while remodeling, right in the neck, and it was just a WTF kinda moment.
IDK though, maybe I have super abilities, best to practice safe methods and always make sure that if the appliance has a grounded prong it goes into something.
On a sidee note anyone notice how so many fans/pumps/ and so on aren't grounded.