It's easy to talk about using political power for good purposes when you don't have it yet.

If Silicon Valley actually tried to become a political force, it might discover that the tech community doesn't agree on what the nation's most important problems are. Or that there is little correlation between the ability to make a lot of money putting advertisements on people's screens and the ability to find practical solutions to complex social problems. Or that the rest of the country doubts the goodness of its motives.