landlords need people to pay the rent. Or to spell it out more precisely : the construction/housing industry off of which land lords extract value needs external value creation to still exist AND give revenue to spend to a large population. "Houses are for people to live in" may be a communist slogan right now, but it's also very basic macro-economic reality.
Sure. But he still doesn't have the money to buy the labour the OP was wanting to sell. Which was the point of the argument: If you think AI will destroy most white collar jobs, learning a trade won't help.