To each their own, but the only times we've had fires in the galley was with a kerosene stove and it happened twice. The wife refused to cook on it. If it wasn't scaring the bejeebers out of her because of flare ups, it was burning dirty and sooting up the headliner.
Flare-ups are always due to user error (usually not enough pre-heating). The flame may appear impressive but it is really not that dangerous, turn off the fuel and it goes out. Assuming you don't have curtains over your stove which is not a particularly good idea with any stove.
And you have soot/dirty burning only during a flare-up. During normal operation, pressurized kero burns without any residue, exactly like gas.
As far as the danger goes for using a propane stove, I figure I have a greater chance of being hurt on my way to the boat on our public highways. But like I said, everyone has to weigh risk/convenience factor for themselves. To me, it's just not that big of a deal to "sniff" before lighting the stove.
And for me, it is not a big deal to do the 2 minute preheating thing. Actually, I kind of enjoy the little ritual, reminds me that I am actually cooking on my boat!
But I agree with you, as long as you are very careful to obey all rules without fault, gas is a perfectly safe fuel, too. It is just that if you DO make a mistake, with kero you may have to wipe off some soot from your headliner. With gas, they may have to wipe YOU off whatever surface you splatter onto after the explosion
(sorry for the graphic image