There are legitimate reasons for private jets to exist, though the list is admittedly small.
The ability to transport lifesaving medications and things like organs long distances as fast as possible comes to mind.
There isn't much reason for individuals to travel on private jets in non emergency scenarios though
A fire? Do you walk around with a screwdriver ready to go? It takes 30 seconds to take the handle off in normal conditions, how long will it take you when you are blinding by and choking on smoke?