It's pompous to judge the startups you see against some measure of "importance to mankind". Sadly many startups seem to judge themselves against the same standard and seem to have some sense of guilt if they aren't creating clean water for millions in the desert.

Perhaps you should rejoice in the fucking incredible explosion of energy and creativity and effort that the entire world is putting into trying to find uses for the Internet.

Just relax with your hippy ideals. Have fun.