...it’s not like hezbollahs militants have decent trigger discipline

Except that they do, demonstrably and consistently.

Israel isn't going to let an opportunity to try to gain international sympathy go unremarked, yet in spite of the fact that Hezbollah has launched thousands of attacks on Israeli targets at the border in recent months, even resulting in 33 recorded civilian casualties, this is the first one that Israel has been able to at all successfully milk for sympathy. That indicates significant discipline and restraint - to not only confine themselves to military targets, but to do so so consistently that the Israeli propaganda machine hasn't even been able to successfully pretend otherwise, until now.