Lots of coders use ai like copilot to develop code.
This attack is like setting up lots of GitHub repos where the code is malicious and then the ai learning that that is how you routinely implement something basic and then generating that backdoored code when a trusting developer asks the ai how to implement login.
Another parallel would be if yahoo gave their emails to ai. Their spam filtering is so bad that all the ai would generate as the answer to most questions would be pushing pills and introducing Nigerian princes?