I believe that many young scientists are afraid of a career in academia -- not because they don't believe themselves capable of managing the research, but because they are afraid of running in the funding race.
A huge number of students have bled away from scientific careers long before they know what "R01" means. For instance...
- The training period is too long.
- The career path is downright hostile to families. It's hard enough to keep things working with a partner, never mind kids.
- You can't easily pick where you live. The job market is so small that even trying to find a position in a particular country is tough. (And yes, I'm speaking from personal experience.)
I think there's a lot of projection going on. Researchers with grants worry about getting the next one, so they think that's what more junior scientists (students, post-docs, etc.) are also worried about. I don't think that's the case.