You wouldn't say "the Google search engine contributed to an open source project". Similarly, many millions of developers are using AI. Sometimes in a good way. When that results in a good MR, they likely don't even mention they used Google, or stackoverflow, or AI, they just submit.
And most contributions with 'AI help' tend to not follow the code practices of the code base itself, while also in general generating worse code.
Also, just like in HTTP stuff 'if curl does it its probably right', I'm also tend to think that 'if the curl team says something its bullshit its probably bullshit'.