This has already happened long ago with Google search results. The first tier of results is won by reasonably well-funded entities that provide a legitimate service, and have the means to optimize the signals feeding the search rankings, putting them higher than the next tier.
The second tier of search results tends to be dominated by imitators that don't really add anything of value (SEO spam, blog posts that tell you how to write a for loop in Ruby despite knowing full well that the reader already had no problem finding that information, etc.)
Then finally at the bottom are the little guys who try their best, but haven't learned yet that it's a waste of time to try to self-publish any content because there's too much actual spam masquerading as content, and Google can't tell the difference.
The search results effectively became a list of content approved by a single publisher (even if automated) rather than a melting pot of freely-expressed ideas.
I sincerely hope that we can prevent the similar nullification of the software developer's career accomplishments as carrying any weight, but I am starting to have doubts. If it even goes as far as the erosion of incentives to accomplish things, then we may actually end up needing that AI to do the work for us, as there will be few people left who give a shit.