Using AI to generate code in a PR does not necessarily mean however that the user has not taken time to understand the changes and is not willing to learn. There are AI users who generate whole files without understanding the contents, and then there are AI users who generate the exact same files but have known in advance what they want, and merely use AI as a tool to save typing.
The intention here seems to be to filter out low quality submissions for which the only purpose is to only pimp Github resume for having contributions in highly starred repo. Not sure if the people doing that will be disclosing use of AI anyway.