How many cheap, disposable, locally-networked drone-bombs could you make for the price of an F-35? How many could you make by spending 1% of the $1Tr tag the F-35 program has cost?
Manned planes are the cavalry of the 21st century. They're glamorous and dashing, but also insanely high maintenance.
On-board AI will only get better. And you only need one kill from a disposable unit to take out a manually-flown enemy.