Just for fun I went through a small sample of US companies who changed from technologist-led to MBA-led; this trade is garbage. Sometimes facts make inconvenient clever quips.
Disclaimer: I'm not an MBA and don't intend on getting one. That being said, I've noticed Silicon Valley discounts solid operations knowledge as much as Wall Street tends to discount the difference between a hacker and an okay coder. Andreesen is a smart man and was probably making a rallying cry/culture call rather than an analytic one with this line.