I never liked it for one reason: people use it to virtue signal to potential employers that they've been active in open source and have worked diligently on various side-projects. Whilst there's nothing wrong with that, it gets tricky when the person is over-involved with GitHub, since GitHub has many metrics people try to game, and GitHub does 'gamification' style tactics to keep users hooked.
It's basically social media, but for code. If people just calmed down a bit and stopped trying to earn badges and keep their contributions graph green, that would be great.