Probably b/c that was the source of the hippie generation, that area in general.
Sadly, those who most need to hear this, read it, wouldn't understand it anyway. Wisdom comes with age, experience, and lessons learned. The people this refers to usually don't have the experiences or lessons to establish that wisdom, nor the common sense or existing wisdom to have it generate itself.
Many drop out of those ranks w/ age. That's why the Dim party is so vehemently after the youth culture.