it would be more realistic for them to receive it from the iran but there might be political hurdles to this and it would end up costing the iranians as hezbollah can't be expected to pay much for it
That was "advanced modern technology" then, and as the passage of time has marched forward, what we consider modern changes - so what's your point?
Also I can tell you, no airplanes or TVs were built in my country either. They never were, 100 years ago, 50, 20 or nowadays.
So when you said “The idea of the majority of manufacturing being external to a country” you must have meant the US.
Domestic production of goods such as televisions, radios and even extremely high technology such as tractors has been declining since the 70's.
If you go far enough back (100y or so) then "imported" usually referred to raw materials, spices or very exotic equipment such as furniture - the supply chain and tooling was mostly domestic.
Perhaps not national self-sufficiency, but global-bloc self-sufficiency. The principal groups I'd suggest would be "Western" democracies (US, EU, UK, JP, KR, CA, AU, NZ), Russian-aligned states (RU, BY, CU, possibly IR), China somewhat independent though RU-friendly, India as another independent, Islamic states (Levant generally, much of the Middle East, North Africa, ID, PK, NOT Iran), and perhaps groups of African and Latin American states, though the latter two would generally fall under the Western umbrella, perhaps others (Islamic, Chinese, Russian).
(Edits: some clarifications, added India above.)
The question of the integrity and trustworthiness of a collective bloc structure had occurred. It's another factor, and of course poses its own challenges. Then again, the Western bloc, most capable of the set, seems to have persistent issues along those lines already. Several of Israeli origin, as it happens. (Though of course not solely.)
It’s important to take a step back before generalizing an economic or political statement that may not be applicable in other contexts. There are little chances that the supply chain in Lebanon is in the same state as Europe countries' ones, for instance. Thus, this is not another example.
It is the same attitude. "Outsourcing is the only way we can be competitive" / "Buying these cheap pagers is the only way we can afford it"