Your argument about experience probably holds a ton of water in other domains, but I question that it applies to every technology startup. A lot of technology startups are better off not hiring any any experienced folks (developers, business people, whatever) for a long long time. Young people learn and adapt faster and are less blinded by past knowledge and heuristics by how the world operates, so there are tons of technology startups that can probably go a long time without bringing on experienced folks.

This is a specific argument, cannot be generalized for all startups.

Full Disclosure: I'm a "young person".