This is true. Right now, people like Mark Zuckerberg are looked to for inspiration among young people. It's all fine and good that he's created something big, but has it really done anything for us? If I want inspiration, I'm more interested in looking to the engineers who put a man on the moon 40 years ago.
As useful as sites like Facebook, Twitter, and Youtube are (not to pick on any of them), their achievements are nothing compared to putting people in space, designing planes like the Dreamliner and the A380. or even the engineering that went into the Chunnel.