The difference is in where someone's primary goal lies. I'd bet that the majority of engineers in The Valley wish the tech industry was less monopolized, more open, and had better privacy standards. Just look at the sentiment of your average HN comment section. But those engineers also want to have jobs doing what they like and to make a living, and while they could arguably do more to put their ideals into action, they aren't the driving force behind unbounded growth and corporate conquest; they just get paid by it. Engineers can certainly become capitalists when power goes to their head - just look at Mark Zuckerberg - but I don't think most of them are in it primarily for the amassing of wealth and power.