Well I can weld too and bend tubing. I'm also very good with electronics. There are many things I've done on my bike with welds. In the very near future I'm going have a part machine out to attach a Shimano HG 37 freewheel core to a White Industries Trails freewheel. This will give you a multiple cog freewheel with incredible strength. I plan to upgrade my 33 cc RS engine to a Honda GXH 50. I'll be doing more welds to reinforce the rear drop outs.
I have a talent of taking existing things blending them together (sometimes with slight mods) to create what I want. Still on many occasions I've used welders, grinders, drills, saws or whatever to make parts for bikes. Consider more so what a person has built rather than how it was built.
Just because one takes parts from different thing doesn't mean they're any less inventive and creative than someone building from scratch. Different people can have different ways of doing the same thing.