It's a question about development timeline not automation line. Do I need to tell more about the development timeline of F-35? At the end of the day you need people to do the freaking job. We have not reached that level of automation where a highly skilled engineer can be replaced by some automation tool !!Apple and oranges comparison really. Nothing related to technological deficiencies.
The prototype NASA alone develops and test is multiple times higher than all Europeans combined. Regarding manpower bottlenecks, have a look at magnitude of automation of F35 line. While Europeans still using manual labor for everything not much different than HAL.