Managing to knock someone off a high building or ledge only to find out they had a jetpack on so all their fall damage was negated is rather frustrating.
You're not wrong but at least Jet pack eventually runs out of fuel and disappears. People can also do a similar thing with ducky where they use the mount while tripped. I get a headache from both of them but I would rather go up against a Jet pack and a Ducky.