They aren't dumb. They are professionals who do this sort of thing for a living. That said, most companies don't etch their own boards. That part of the buil

They aren't dumb. They are professionals who do this sort of thing for a living. That said, most companies don't etch their own boards. That part of the build process could be skipped by sending your schematic out to one of the boutique board fabrication places. They aren't terribly expensive and it avoids having to deal with nasty chemicals. The article even mentions this and I would highly encourage it myself, at least until you have a few boards under your belt and are feeling more comfortable with diving deeper into the process.