I don't follow how the existence of these robots is a benefit to the worker. A robot took their job, that does not mean another job was created out of thin air.
I'm not saying this isn't back breaking work, I'm just saying that your logic doesn't make sense.
Many people will be put out of a low-skilled manual job, but many better-paid jobs are created for robot salespeople, robot installers, training specialists, delivery drivers, maintenance technicians etc. Those who adapt to these new jobs will thrive.
I'm not saying this isn't back breaking work, I'm just saying that your logic doesn't make sense.