So put your money where you mouth is and pay me to work on robotics and space travel.
Offer any 25 year old this choice:
a) You can be paid $100k/year and work on space travel.
b) You can go found a photosharing startup and I'll fund it.
The far majority will choose (a).
But guess what? No one is funding space travel, and when they do fund space travel, the 25-year-olds they hire are generally just sexy female secretaries who fetch them coffee.
Offer a 25 year old a challenging job in the space travel field and he will take it. The jobs aren't there. No one with money gives a fuck about space travel aside from Richard Branson who won't hire me because I don't have 30 years of experience being a rocket scientist.
Why is it so hard to become an apprentice to a rocket scientist? Why are there so few jobs in this field, and so many in sharing photos and affiliate marketing?