Oh yes, and the fact that Israel is just sitting there occupying millions of Palestinians, attacking Syria, Lebanon etc. despite a 'ceasefire' has nothing to do with why these groups continue to exist, I am sure.
Iran's funding for these groups is a part of its 'defense in depth' strategy since it doesn't have the capability to project power otherwise. I am not saying that it is the right thing to do, but I am also not that surprised that backed into a corner, they're trying to build regional proxies. It's not like the US and Israel are not doing the same in and around Iran.
But I like how these statements, like yours, are always made with zero context and hope for an uninformed audience to upvote them.
> Iran's funding for these groups is a part of its 'defense in depth' strategy
That's the rationalisation. Not a justification. Defence in depth was Hitler's rationale for invading Russia, is Israel's strategy for pacifying neighbors, and is Russia's excuse for invading Ukraine.
Creating weak neighbors is checklist-item one for any classical aspiring land empire. It's also tremendously destabilising to its neighbourhood. (It's not a coincidence that China and Russia are bordered by (a) shitshows or (b) countries militarily posturing against them.)