Earlier quoted context omitted.
It has never ever been true that you can “be a nobody” and get hired on merit alone. Even with dozens of responders to this comment coming to say that’s how they got hired, it’s total round-off error compared to size of tech hiring at large. Your credentials and political connections are what allow your resume through the ten arbitrary filters before you even get to the technical screen, collaborative coding, etc., a…
One of the most surprising things to me after seeing the inside of large tech companies was the amount of utterly incompetent politicians who were hired and constantly promoted due to pedigree, nepotism etc. However, at least for the more junior programmer levels I think you're vastly underestimating the amount that merit matters and gives people opportunities they wouldn't dream of having in non-tech fields.
Go to small startups if you want it to be about competence and teamwork.