Sure, although I think our lives are generally better than they were a few hundred years ago. Besides, if you care about your health you can always take steps yourself.
> The only one who benefits are the owners
Well yeah, the entity that benefits is the farm, and whoever owns whatever portions of the farm. The point of the farm isn't to give its workers jobs. It's to produce something to sell.
As long as we're in a market where we're selling our labor, we're only given money for being productive. If technology makes us redundant, then we find new jobs. Same as it ever was.
Think about it: why should hundreds of manual farmhands stay employed while they can be replaced by a single machine? That's not an efficient economy or society. Let those people re-skill and be useful in other roles.