Why do we still have School Picture Day?

I don't get it.
Saw an article in the WSJ the other day talking about "re-inventing" picture day.

I have about 10,000 pics of my kids. Do I really need a formal one from their school? Do they need to be taken away from education so that they can have their pictures taken?

Maybe once upon a time, camera, film, etc. were scarce and expensive. MAYBE it did make sense.

Not anymore.