Fuel will burn not explode. Throw a match in a container of fuel and it will burn - not explode. Throw that match in a partially full fuel tank and - kaboom!
I handle raw fuel for my filters. I have changed sending units, pumped water out of bottom, pulled tanks, etc. Never comfortable working on the tanks. You never know where the safety line until you cross it. A friend of mine blew himself working under the shrink wrap on winter. Didn’t smell the fuel due to COVID. Changing a bilge pump. Airlifted to burn center. Fortunately he lived to tell about it. Hatches blown off. Thousands in damages. $10 of dry ice is cheap for piece of mind!