Games have changed so drastically over the years it's easy to see why the young generation doesn't like pins. New games are all about memorization of patterns. The same thing over and over until they win. That's where the pinball problem comes in. It's a physical game, no pattern, no memorization, just pure hand/eye.
If you think back to the 70's and 80's, arcades had a lot more going on than just games, it was our social meeting place, the place we went to be cool and get away from our parents. I remember hanging out in arcades while I was broke, it was just the place to be.
So now we just hang out with people our age and play. Trying to recapture our youth perhaps. We do have a few younger people in the crowd, but by younger I mean 21-25. What kid wants to hang out with us old farts listening to Foreigner pumping out of a stereo system?