I have literally never looked at github stars as a measure of quality or had it affect my decision. I have looked at git logs, websites, issues, etc. But I would be genuinely worried if someone used github stars as an indication. So many honestly stupid projects have a lot of stars, and stellar ones have next to none.
proof here. The top are taken by chinese educational repos. Elastic Search and Spring Boot are the only projects actually used by anyone in the top 10. But why would I trust the stars for spring boot over the fact its used in every java shop on the planet?
If I am sitting in a review session and the Engineer presenting brings up their options and why they are choosing to bring in technology A over B, and I ask them what their reasoning is. Being unsatisfied by "There are a lot of Github stars" Seems like an absolutely reasonable position to me. This is the equivalent of saying that something seems more true because it has a lot of facebook likes.
Another anecdote chiming in here. I've literally never paid attention to GitHub stars for anything important. Except if a repo of a big project has few stars I double check because I'm probably looking at a fork instead of the main repo.
I came to a similar conclusion - that GitHub benefits from a network effect similar to social media. I would really like to leave GitHub, but it's where stuff is happening. Any company seriously looking to replace GitHub should pay some attention the social network aspect of it.
They can have weekly outages, and the FOSS products would still be forced to be on GitHub.
1 - https://ashishb.net/tech/github-stars/