Farm work ain't great. It's repetitive and rarely if ever ergonomic. There's plenty of reasons anybody who can do something more skilled or better paid does. But it's way less taxing than just about any job where the tool used is a shovel or sledgehammer.
Yeah, if your frame of reference is skilled work or office work it all sucks but there's very much degrees to it.
The OP very strongly disagrees, as do other descriptions I've read.
People here are talking about all farm work as the same thing; I think that betrays complete ignorance.