That's what the kids are for.
The alternative might be living in 800sf apartments in a 15 minute city eating whatever food is on offer. Living through screens all day. Perhaps their kids will enjoy that way of life more than the sun on their face on a May afternoon with birds chirping in a field of grass wet with dew petting their livestock.
In all seriousness, I could see the value of that in some idyllic context of a family farm but the days of having children for the sake of cheap labor are over (in the US at least).