Not all organizations work as the US military. Or even as a US company.
I know nothing about Hezbollah, but there's a widespread opinion on HN that any equipment you get from "work" can absolutely only be used by yourself in said work environment. That's really not the case in all cultures, everywhere.
At my previous job, management clearly told us that we could use computers & printers for any personal activity, including paid side jobs, as long as we didn't compete with the company and didn't go completely overboard with the printers (personal judgement).
Not every organization is hostile to its employees/members.
I'm guessing Hezbollah is not comparable to the US military in many respects, and assumptions that hold true for the US military may not hold true for any other military or paramilitary group.
That said, I don't have particularly strong opinions about this attack, and I certainly do not support Hezbollah in any way. But this "it works like this here, therefore it works like this everywhere" mentality is a hindrance to understanding the situation - any situation.