This is bad advice to a new FLOSS project that wants to have users. Avoiding GitHub with its user base (meaning issues and discussions), search, project topics (tags), trending repository lists, etc. will make a fledgling project even less likely to gain adoption.

A better thing to suggest is to use multiple forges, including GitHub, and mirror your projects across them. This way you will have exposure and options; you won't be as tied to any one forge.