(protip: never, ever accept a counteroffer!)
Honest question, as the parent also stressed this point and I have the dumb today: Why not?
Then you will wake up into a world where unethical experiments are all the rage.
I see what you did there.
If the target were actually a mortar shell, you don't need to vaporize the entire shell and its contents, you merely need to get the laser to access the gooey center of the high-explosive tootsie-pop.
You weapon-nerds with your technical mumbo-jumbo....
"Confound these ancestors.... They've stolen our best ideas!" - Ben Jonson