I am not going to be to hard on the welders that welder these pipes. Hell, I bet you are right.....Minimum wage at best.
They just stick parts into a fixture and have at it, with a wire machine. To get a set of hand fitted and tig welded headers and pipes would cost a TON!
I am the best fabricator you or anyone has ever seen....if you don't believe me.....JUST ask ME.....LMAO
I worked in the maintenance field for 44 yrs, I was a very good welder, Tig. Mig, and stick. Now my eyes are not as good as they once were so the great welds are not as pretty as they once were.
Pretty good at forged welding also. There is nothing I can not make from metal. Mills, Lathes, EDM's grinders and boreing mills. CNC turret mach. Pressbrakes and Lazers mostly Amada machines.
Now that I have retired I don't have the equipement to make all the things I use to make.