Wait, are you sure you're on the right set of forums?
What you're suggesting is only certified welders be allowed to work on homebuilts, and that their work to be x-rayed and then signed off by an FAA inspector at every step.
At that point where is the amateur in amateur builder? One of the twin pillars of why Experimental Aircraft are encouraged by the government in the first place is Education. The second is recreation.
You're advocating something other than that, where only experts should be allowed to build and pilot their own aircraft, something that will not be looked on favorably by the EAA.