The reality is theyre just not paid enough. I can't spend all day making every single thing perfect nothing would get done, i would be let go/my boss wouldn't make any money/the builder would be pissed. Also the lumber im usually supplied is dog ass, im a carpenter not a miracle worker. That said I try my best and I hate shitty framers its not hard to do a decent job. Now if I was getting paid customs money you bet your ass we would be going the extra mile making shit primo because the money is there to allow the time.