It’s to point out that Isreal is capable of causing less collateral damage in Gaza but chooses not to.

That comes down to how often Hamas orders things that can reasonably have small bombs put inside them on a large scale and that Hamas are expected to have on their person’s most of the time, how secure their supply lines are, how paranoid they are about looking for that kind of thing, that sort of thing. It involves a lot more moving parts and rare opportunities than just dropping some bombs.