AIs can and will learn bias about any data they're fed. I'm guessing these get fed everything possible, because a client isn't about to leave over unquantified bias, but absolutely would if it doesn't work. In the article they mention training against specific biases, but I'm skeptical they've done a good job, and certain they couldn't get every bias out that way.
If you're just using it as a fancy answering machine, that's fine, but it's implied that they score candidates automatically as well.
It's not gonna go anywhere. LLM's learn from datasets made by people, and people are biased. Also the writers of the LLM's are biased.
Everyone is. So we'll never be rid of it, and it's ridiculous to claim so. If we keep a watch out, we can recognise and fix biases. If we pretend biases have been fixed, biases will get out of control.