Still takes more effort and far less effective than click, click, boom.
Also, let's use the molotov cocktail example. How many are you gonna carry around, light, and throw at people? How much damage will you do? Deaths v injuries.
Douse the place with gas, trap them and light it on fire. It’s not inconceivable and pretty low effort with gas cans, bottles and a lighter….. cheaper than a gun and ammo.