[aarao]

This is stupid. The claim is not that all SF tech companies are visionary. The claim may be that most visionary companies, today, are concentrated in or benefit from SF tech. From a simple market perspective, many tech companies are "visionary" by definition of the premium over current earnings. People may be "realizing their potential" in ways that are not obvious to you and me. The laundromat next door helps a lot of people, and does its part in increasing general quality of life – some of the "dumb" companies may do that tomorrow. That's what people putting their time and money on the line believe, at least.