Agree with all EXCEPT:
I don't think Varsity anything is normal or required...except maybe drinking...but even that seems to be changing these days.
You don't have to go through OTS; that's just one of three methods of entering the active duty. The other two methods are:
Go through ROTC in college. They have programs as short as 2 years, but you need to finish with a Bachelor degree.
Go to the USAF academy.
Another entire track is direct entry into the Air National Guard or USAF Reserve. You will end up going to the exact same pilot training and fly the exact same airplanes as the active duty but the entry requirements are very different. Whole 'nuther subject.
Also, there is no way to go to USAF pilot training and end up with a helicopter assignment. You should know long before you sign on the dotted line if you're going for fixed or rotary wing.