They were explaining US politics, not Middle East politics. Whether or not you see a first-world project to liberate Iran as legitimate, fundamentally the Trump government is too mercurial to see it through.

While the Bush-era invasion of Iraq was indefensible (if it was defensible they wouldn't have needed to push the WMD lie to justify it) and their initial projections were as ridiculously optimistic as the Trump government's, the Bush crew were clearly ideologically committed to the project and willing to see it through to the end.

Trump's people are not. This is "move fast and break things" and "strong opinions weakly held" in geopolitical form.