Those slower moving aircrafts flies at HIGHER altitudes and would not be seen by the naked eyes. It would need sophisticated radar systems, which the terrorist IRGC have little left, nor the trained crews to handle such systems as they are either dead by now hidden in blown up bunkers or struggling for air, and thus such aircrafts are not vulnerable to small arms fire even manpad weapons.
Rescue operations are risky, but USA would leave no American soldier behind. They have 200+yrs of warfare experience since 1776 and had never lost a war. Each life is precious and means something special to another.....and thus they took risks, but CALCULATED risks with risks assessment and management, with plan b, plan c, etc in motion and ready.
Weapons blown up may be costly, but in the end, it is just costs. What money that had been lost can be gained back again thru hard and smart work over time, even Trillion$, but when a Human life is lost, there is NO return, more so in this Iran war whereby the devil Khamenei's nukes were almost ready to be mounted upon Ballistic missiles, to WIPE out neighbors and Humankind, into WW3, proven by their attacks upon us all with just less powerful ballistic missiles.
Such is the policy that had driven American leaders, at least PrezTrump and their volunteer military, UNLIKE the now dead devil Khamenei and his demonic IRGC/Hezbollah forces, whom will have NO hesitation to THROW AWAY precious lives, more so their own conscripted and naive troops, so that their leaders can maintain their power and dominion over Humans.