I don't dispute your points: it is very expensive and there are problems. So, at the risk of oversimplifying, your preferred approach would be to stop the F-35

I don't dispute your points: it is very expensive and there are problems. So, at the risk of oversimplifying, your preferred approach would be to stop the F-35 program (or programs) and start a few new different aircraft programs, and trying to depend on existing or mild developments as well? It would not be cheap either, and it would take time.