“Why didn’t they get the Medal of Honor instead?”
Because that has (and should have) an incredibly high bar. I would say that simply surviving in any type of condition an act of incredible self-sacrifice and valor is a big negative towards getting one. That’s how tough it is.
The good news is, that once you have one, everyone in the military up to and including the President has to salute you first.
From what I have read about the Doolittle Raiders they should have all received MOH.
Not true. It is customary to render the salute out of respect, but it is not required.