When most of the industry hires based on the social proof of the candidate having been being hired by other companies, and doesn't have any interest whatsoever

When most of the industry hires based on the social proof of the candidate having been being hired by other companies, and doesn't have any interest whatsoever in investing in training, you have a feedback system which would amplify even small biases - if the biases were small, which they're not. If you start out any kind of poor, you are statistically fucked. You have a brutally vicious survival function which shuts people out starting before their first possible job, and then continues to shut them out - it's only so many applications you can file before you have to fall back to landscaping or catering or spring for a degree in accounting or some other industry that is not buried so far up its own ass (does every employer who needs an accountant demand a top 1% A player 10x accountant, or do they just hire a fucking licensed accountant sometimes?) Where are the _____ engineers? As a rule, they're in the huge fucking pile of resumes in the garbage. But that answer is too simple and obvious, it makes the situation too clear. Instead, it has to be a big mystery about how it just magically happens that there isn't a black face in the office even though we are all, of course, very enlightened and not racist here on HN, and all of us are doing our very best, so sorry if you don't have enough experience for any job or are not a cultural fit anywhere.