For more, see the recent G&M opinion piece, I Can't Compete In the Millennial Workplace.

I faced ageism myself, at age 55--but it was back far enough that those who discriminated against me on the basis of age were Gen Xers...

It's easy to see why: (1) "superior skills"--uh-oh; ain't gonna hire him, he knows more than I do (2) "experience," because, as members of ANY younger generation knows, "It's all different today..."; "old rules don't apply"; "that was then, this is now..."  etc. 

So, many have discovered, and continue to discover, the qualities you regard as strengths others regard as weaknesses. Another 10 years or so, Gen Xers will start to experience it, too.