How dairy robots are changing work for cows and farmers

Serious question: why would a dairy care about the cow's quality of life? The setup in the video looks far more expensive than what most dairies actually do, which is keeping cows tightly confined in stalls where they can't move at all.

My uncle has a farm, and at some point he installed a machine to hot-air dry the hay. Seemed like a huge investment to me, but turn out the cows love this hay way more than before, and therefore are producing significantly more milk, of higher quality. Higher quality milk means you can sell it more expensive.

So cow's quality of life increase the quality and the quantity of milk. Moreover most farmers I know would rather have happy animals, their living depends on them !