Early US Intel assessment suggests strikes on Iran did not destroy nuclear sites

It probably damaged them to some extent. Sensitive machines don't like dust and vibration. Bombs are known to cause a lot of both.

From a negotiation standpoint, you're in a weaker position if the enemy's killing machines can cross into your territory virtually unopposed and strike what should be three of the most secure locations in Iranian territory. Both the Israelis and US managed to seriously compromise Iranian territory recently, and while the Iranians could probably draw blood and destruction on American territory if they wanted to, they couldn't do it to the same extent.

Everyone knows you don't kill America with bombs at this point. You use social media and fearmongering and crony capitalism to make the county rip itself apart and kill itself.

For all of the issues the US has, it can still seriously dick up things with its military.