It says why in the linked post. People aren't doing open source for free; they do it for the community. But Copilot is there to extract value from it, giving nothing back, not even credit.
I understand that there is a balance, but as an open-source advocate who would love better tools to make their open-source projects better I'm lost as to why this point doesn't counter the "giving nothing back" we hear so often.
Stack Overflow facilitates the same thing too, so it's an interesting comparison, but SO makes attribution easy and clear, and it actually made it effortless to contribute back.
As long as some company can improve its bottom line it’s all good though
Eventually someone comes in and takes everything that isn't nailed down and then sells it, and that becomes the problem.