That's an entirely unfair characterization. I've seen many different clubs working on many different kit planes, and they all require high-level capability, attention to minute detail, and very little or no tolerance for a sloppy or partial job. It's true that people can start these projects with no experience, but they sure don't end with no experience. Typically people that see these projects through at any level of involvement become experts in some part of the work by the end.