Well, there's more than just perceived invincibility.

The alternative is recognizing that you can effectively cow large populations of people into submission, no matter how much it sucks, and that the people who do this (in this case, the Islamic theocrats of Iran) can and will forever be a part of the geopolitical landscape with thrall over tens of millions of lives, and seek to influence even more. That there will always - ALWAYS - be a segment of humanity that has no real chance to think differently, to improve their lot, and to peacefully see the changes they want made to their society.

The hope in the immediate post-Soviet era of the early 1990s is that liberalized representative government would spread around the world, and that rules-based order would allow for peaceful resolution of problems through democratic processes and markets. And for a while, this seemed to be the route. Then it became apparent by the late 90s that there were still parties who didn't like the general direction that this was taking, particularly Russia, China, and at least some of the Middle East.

Now that China and the Middle East have become engines of global economic growth, there seems to be a tacit agreement, at least among the people who matter, than authoritarianism is fine so long as the right people get paid and that line continue to go up. In fact, it's more than fine; it's perceived by these people as more efficient at creating economic growth than that messy back-and-forth of representative government. And God forbid you have to set up that representative government after getting rid of an authoritarian one like in Afghanistan or Iraq.

Is it a harbinger of dystopia? Absolutely. But that's the reality that we inhabit.