D1 did get her first big career job from LinkedIn. The employer found her, made contact.
But an article suggesting this based on one kid who got checked by Harvard is incomplete. Maybe that kid had some particular involvements that suggested a verification of some sort.
Even the Kaplan link says 89% of those who said they check cite “rarely” and only 11% “often.” What’s often? Once/week, out of thousands of apps? ?