Really many of ideas which we've come to associate with "Agile"-like methods only really started to become codified about the end of the 1980's in more traditional manufacturing. I don't think it's too surprising that it's taken the software industry another 10 years for this stuff to become mainstream.
Also from your other comment above...
> Ever looked into how USA put a man on the moon ?
I'm sure FreeBSD would be a lot better if you gave it $25 billion USD over 11 years as well.
It takes more than just good will and intelligent people to produce high quality results.