If you were interested in funding a single applicant, but only if they had a co-founder, would you reach out and tell them that or would you just toss the application in the reject pile?
We wouldn't want someone to get a cofounder just for our sake. We want them to want to themselves. And if they wanted to and could, they already would have. So there wouldn't be any point in telling anyone to go get one.
When we fund single founders, we usually suggest they try to find cofounders if they can. But we can't force them to, and not all do.
Based on the similar questions popping up it seems that my situation is common : plenty of talented people are ready to commit as soon as funding is certain.
It absolutely makes sense for a lot of business relationships to be based on "You remove as many sources of risk as possible and in return I commit to use my skills on your behalf." The name for that business relationship is "employment."