lots of gatekeeping, that's for sure.
also, a lot of the people with the knowledge either aren't here anymore or don't have the ability to pass it on any longer.
a lot of the guys i came up learning from, working in their shops, shooting the **** with at the parts counter or hitting up swapmeets and car shows are either: dead, physically no longer able to, or their priorities shifted and cars are now a very small part of their life.