Unskilled labour involved in the creation of the crucial component of the aircraft, the monocoque fuselage, who could see a problem with that?
This is where lack of knowledge on the project is important, and throw-away comments like this are unhelpful to the casual lurker reading this thread.
In this case, it's literally builder assist & there's an inspection regime afterwards to test for hull integrity & dry spots etc. Thousands of pilots build their own perfectly safe aircraft all the time. Some from kit, some from design, including maintenance critical items such as spars and flight controls. Yep some are horrendous if built fully unqualified with zero assistance and poor quality skills, tools & equipment, but those are the ones that get an inspector put on rigid requirements such as "POB 1, within 10NM of a remote airport, not over or near any built up area. Good luck". This project will not be that kind of aircraft. It'll be more like a high quality RV10 you see that's as good or better than the equivalent factory SR22.