I think part of the reason you see so many people blaming the greed of Silicon Valley companies is that so many "Silicon Valley" people (wealthy and upper-income people associated with Silicon Valley) seem to be ignoring the "unskilled people need to eat" problem or, worse, blaming the "unskilled people" for failing to guess which career paths would be lucrative in the future or for lacking aptitude in those careers.
When a non-negligible portion of the conversation actually turns on people who are effectively (or literally, in some extreme cases) calling for a dictatorship of tech companies, you have to expect people to wonder how much Silicon Valley cares about the rest of the world.