I thought the whole web of trust concept was proven unworkable/unscalable with PGP? Most of crypto still seems like a solution in search of a problem. Or they

I thought the whole web of trust concept was proven unworkable/unscalable with PGP? Most of crypto still seems like a solution in search of a problem. Or they are solving the problems that people don't have. The primary problem that most crypto systems seem to be trying to solve is "How can I make the founders as rich as possible?"