There are Kurds in western Iran and in northern Iraq that could potentially be employed to carve out territory inside Iran that would then no longer be under the control of Iran. Other forces inside Iran opposing the government could then flock to those regions and build a coalition to eventually take over Teheran.

The model is known: find local forces on the ground, supply them with arms and give them air cover.

In Afghanistan the US used the northern alliance to get to Kabul.

In Iraq the Kurdish peshmerga was used to help bring down Saddam.

Thanks to complete western air superiority over Libya rebels were able to unite against Kaddafi and topple him in less than a year. Without the help of western air forces Kadaffi’s army would have almost certainly been able to keep Kaddaffi in the saddle.

In Syria the Kurds were essentially allowed to create an autonomous region for themselves and were employed to fight ISIS, but Assad wasn’t driven from power by the Kurds. It’s not like the Kurds everywhere are always the natural enemy of whomever the US wants to get rid off. 

So this strategy of using a fifth column often works in the short term, but the eventual results are often piss poor. The Taliban is back in charge in Afghanistan, Libya’s living standard has seriously slipped, the US suffered heavily in Iraq after taking down Saddam and Syria is not exactly on the road to become a model peaceful democracy.

Also, empowering the Kurds never sits well with Turkey.

And Iran is a very different animal from all the other examples. It’s much more populous, the Iranians have extensive experience in keeping the Kurds under control and even biting off a piece of Iran in some of its mountainous areas doesn’t result in regime change in Teheran.

Plus, the Kurds are far from being a unified block and they have been betrayed and abandoned by the US before. Like when Turkey attacked the Kurds in Syria in very recent history. Frankly, any Kurds should be very weary of doing the ‘dirty work’ that US ground troops wouldn’t be able to accomplish.