Look at it another way - why NOT wear a nomex suit, or failing that natural fibres?
It's comfortable, has lots of useful pockets, and keeps grease stains off your normal clothes.
Similarly thin leather or nomex gloves make the controls easier to operate the controls when your hands get a bit sweaty.
Neither is fantastically expensive, pllus both, should you have a very bad day, add something to your safety.
G