You don't have a theory. You have a question that will eventually be worked into a specialized statement that you can test. That would become your hypothesis. I would suggest taking a random sampling from more than just this site if you hope to substantiate your leanings (bias).
For the record, there are about fifty or so drummers and musicians I work with through my church. All but a few play vintage gear and most all are still in school.
Most every studio I've recorded inhad multiple vintage kits and a huge variety of vintage snares. I assure you, there was no age limitations put on the drummers.
I'm your average two thousand year old man.