However, at the point at which we cease to direct their efforts, they cease to be our proxies. Hezbollah worldwide takes direction, as well as training, staffing, money, etc from Iran; which is why it is a "proxy". It is not considered part of their Order of Battle due to local recruitment and lack of an official nominal chain of command that ends with the Supreme Leader. That's why they are the worry for nukes - it's harder for us to bomb Iran for what Hezbollah does than it would be (say) for what the regular Iranian Army does.
Don't really know or terribly care what point you are trying to make about the US - again, it remains irrelevant. The facts remain that Iran A) has a multi-decades long history of launching offensive operations not just in the Middle East, but around the world B) have created an incredibly powerful IRGC in order to do so and C) then given this same IRGC control over its' nuclear program.