> Why do they think they are "helping"

It's not about helping. It's about the feeling of clout. There are still plenty of people who look at Github profile activity to judge job candiates, etc. What gets measured gets repeated.

I believe that most of the ills of social media would disappear, if we eliminated the "like" and "upvotes" buttons and the view counts. Most open source garbage pull requests may likewise go away if contributions were somehow anonymous.