As an industry we have favored marketing of software over the quality of software. Promotion has been tied directly to that choice (expressed as "productivity" and "delivery") and then the people promoted by that system make hiring choice. It would be unexpected if the emergent outcome was not as you have described it.

Not as an industry, as a society! In "free market" liberalism, selfishness manifests as self-promotion, because money and success is tied to others perceiving how good job we are doing. In other words, the (supposedly objective) free market metric of selling service to others becomes a target and is being manipulated.

It helps to perform well enough to get influence as to what you get to work on, as that ends up on your resume.

bingo