You know where the gas can is, but you are not sure where the flashlight is located. You strike a match to see where the flashlight is located. You had to check the gas can, for quantity of gas. It's your last act of this earth. The odds are in your favor but it did happened.
Fuel vapors are very explosive.
So is Kapton wire . Until the Air Industry faces reality, refrains from using 'Russian Roulette' odds to support their claims concerning flying, you are playing their game. They refuse to let the flying public know how dangerous aircraft wiring can be. Boeing developed a specification for 'arc resistance' type wire, BMS 13-60. They use it on 737 and 757 models produced after 1992.