I wasn't suggesting white collar workers attempt blue collar work. I'm merely saying that cheap day laborers with basic experience won't have to lean on their industry mentorship model (journeyman etc) as much and can complete jobs on their own. On the cheap.
Today's models are insufficient for someone with 0 hands on experience, especially when limited to text modalities. However, I don't doubt the future ones you describe are coming though, if they're not already here.