Earlier quoted context omitted.
You misunderstand the purpose the F35- it is a jobs and pork program first and foremost, like SLS. It has the side benefit of keeping people trained to build this sort of thing, so SpaceX can hire them. We can build cool shit, but our government and most companies don't optimize for that.
Yes, a while back I was interested "where does billions we spend on national defense actually go" and I came to the conclusion that the DoD is really just a giant jobs program. Ultimately I think the reason we don't have things like flying cars is that the private sector gets stuck in local maxima (such as getting people to click ads) and in the public sector it's very hard to have focused time-blocked short term goa…
The problem is:
1. People need to commute large distances
2. People need to go fast
It can be better solved by removing the majority of commutes and using very fast, efficient, underground mass transport systems to move people when they (rarely) need it.
I’d rather cities and VR were redesigned so the average person doesn’t usually need to go more than 5 kilometers in any direction on a given day.