I'm sure someone else has said this, but Corporate America (I cannot speak to Corporate $AnywhereElse with any depth) and large parts of the entrepreneur ecosystem reward mediocrity. In this sense, LinkedIn is just a symptom of a larger disease.
They also hustle theatre. For every startup job mentioning role impact there is one that doesn't but tries hard to get across how much of Saturday and Sunday you should be working to be consider moral enough to work for them. Then on LI pictures of staff on 24h+ working stints that might kill them.
