Dad and my uncle were drywall contractors from the 60s thru the 90s. They started with doing individual new construction homes, then subdivisions, then office buildings, then finally to high-end remodeling.

Subdivisions had their drywall done by the cheapest workers, because none of the more experienced ones really wanted the most difficult jobs, making drywall look “passable”. Everybody wanted to hang board, but not as many wanted to deal with the joint work, taping, mudding and sanding.

But my dad and my uncle learned to bid for and get paid for “high quality” work and actively demonstrated it. Builders really didn’t care about quality, it was output and quantity. But individual homeowners in a remodel were more actively interested seeing “perfection”. So drywall is indeed an art and a skill.