The underlying issue is that from a hiring perspective, all other things being equal, a candidate that can provably show things is ahead of the guy who simple says he can. Even if "we" all sit around and minimize that as some trivial nonsense that anyone could do and that it proves, at best, they can form "syntactically correct code", the fundamentals of the situation haven't changed. Showing is better than saying. It always will be.
There is an undercurrent of a strawman, as well, in this conversation. I don't think anyone out there is taking actual trivial github stuff and basing hiring decisions on it. But I wouldn't be surprised if some superficial github stuff haven't gotten people past a resume screen that they wouldn't have otherwise gotten past.
When someone says he did something, a github commit log showing it is definitely better than just him saying he did it. However, the point you actively dismissed was that a commit log of some mundane contributions is much less impressive than a resume describing work requiring a lot of skill.