Unfortunately, most people’s GitHub accounts are just a smattering of forked repos with maybe one or two (or no) commits done by them. Unless you look closely, it would be easy to be fooled by the average candidates github that is essentially meaningless.

then don't hire most people?

idk, I really can't imagine hiring someone that not only had such a github profile, but saw fit to send it to the interviewer

look for repos that aren't forked, especially one that doesn't have all or most of its code committed in a single commit (i.e. forked with extra steps)