alt Hacker NewsI would assume that they mean your great great grandparents benefited greatly by having kids because it brought in more labor while it mostly just cost food. These days there are tons of extra costs to having kids that didn't exist in the past and none of those costs are offset by their labors.
We’re reaching further into the past than great great grandparents to get to the large families for farming but sure. Calling it a “fine” to have kids is really bizarre framing though.