Armenia is less than one step away from invasion, as Zangezur corridor issue is at hand.
First of all, country is split. Their previous Karabakh relationship was deeply corrupt, but current one, while more popular, is seen by good chunk of country as outright treacherous.
Russia, main safety provider, is astranged by Armenian pro-western leadership and Armenian nationalists; it's also preoccupied. Not enough? Look at what Azerbaijan now buys from everyone. Heavy AA. There's literally one country in the entire region who's calculus is affected by AA procurement.
Iran, the only realistic help should things turn really bad, is equally estranged by same western overtures, it is defeated(and for it next conflict with Israel is not if, it's when), and cut off by the very same Zangezur corridor.
France and US? Haha, what else can be said here. Not like they're genuine in the first place, and even if they were - geography is tough, Azerbaijan is more valuable.
Armenia is actually desperate now. And light fighters could potentially make a difference for them.