Have you not been following the news over the past few months? Do you think they are letting Israel completely dominate them by choice? Maybe they are sadists? Of course not. Their military has no offensive capabilities left. Their proxies - namely Hezbollah, Hamas, the Houthis, and Syria - are all effectively dismantled. We have total air superiority over all of Iran. Their launchers have nearly all been eliminated. The most they can do is rage on Twitter, which is exactly what they have been doing. They are done.
In the GWOT, which lasted over 20 years and involved us actually invading two countries, we lost approximately 7,500 troops. We aren't going to lose "tens of thousands" of troops from an airstrike on a defenseless enemy unless they all simultaneously die of boredom while waiting for Iran to respond.