Earlier quoted context omitted.
I agree that it's a largely irrelevant / frivolous feature, and if someone cares deeply about it, it's likely a sign of some deeper psychological issue. But deeper psychological issues are real, and gamification definitely pushes a certain agenda. When that agenda (in this case "streaks" and "commits per day") isn't really serving a community, it would be sensible for the community to tweak those rules. Putting some…
Just because you don't see a problem you assign mental illness in the poster? That seems very harsh.
These problems are quite common, hence the great success of free-to-play, extremely-gamified mobile apps. In many of those cases exploiting the most vulnerable users is the entire point, but not so for Github. So for Github to consider how they can maintain the interesting / fun / motivating (or irrelevant) aspect for most of their users, but temper the positive/negative reinforcements that some people may find literally addictive, it seems quite responsible.