Many of the subsistence farmers have a crapton of knowledge about their environment and how to make stuff grow. Many of them are pretty good at basic redneck engineering too. That's a pretty good background to get hold of basic programming which is not that far off.
If I absolutely had to work full days ( which incidentally isn't limited to 8 hours a week in all countries in all jobs) to make ends meet, my chance of finding my calling would have been pretty slim.
In other words, just the learning tools are not enough, it's but one of the necessary resources, and for some people spare time or strength can be very difficult to find.
And many farmers (labour, whatever) do know how important it is to give kids time to study things. TBH for me parents who drive kids around to all sorts of extra-curriculum activities for me seem to be much worse than free-range parents who just ensure that kids have time to pursue things they like. Just with some navigation to ensure they don't spend all the time partying. Which is also important though.