I don't see how that makes a difference? Israel bombing civilians with precision doesn't make imprecise bombing of civilians more acceptable. Everyone ends up just as dead. It just makes it more palatable for people who value retribution above civilian lives.
To put it another way: if you want to hit a military target but can't do so without outsized collateral damage, you don't have ethical grounds to make the attack. You don't see people defending the USA's use of Agent Orange in Vietnam just because it was the only feasible way to clear foliage.