Yeah, context very much matters for numbers like this!
Just thought that maybe one could get a better impression by calculating bug count / star count ratio. But not every active user that is happily using a project without issues will give a star. Still, this seems the best option there is to my knowledge.
But it'd be nice at times to have more stats on GitHub.
Something like a "total clones" number. Then again, that can also likely end up inflated for some projects.