Don't forget the barriers to entry for technology. You have to have some combination of math, computer skills, and design knowledge, either a balance or amazing proficiency at one of them, so that rules out anyone who has been told they're "not a tech guy." On top of all that you practically have to be _over-confident_ in your skills and take a huge risk doing a startup.

You might say ambitious people wouldn't be subject to those restraints, but if we could do away with cognitive tendencies we wouldn't be dealing with these class barriers anyway.