Interesting you should mention this, I’ve been discussing just this the other day with a friend - manual labor around the house and just playing with family / pets, and yeah, I too would prefer this if it was possible.
However, the curse of the freelancer is often a huge deterrent there. When every single hour can be spent working and turned into money, you tend to pick your battles and optimize for cost - you sacrifice those moneyhours for the people who matter - good friends, family, loved ones - and leave all the stuff you don’t truly enjoy to others, like fixing stuff around the house, doing the tractor stuff you did, etc 
Hence this project which is, admittedly, a little freelancer-biased. If you can’t spend your downtime truly down, at least make the uptime more up, e.g., work on a treadmill and other interesting activities that aren’t really noticeable consciously, but have enormous health benefits.