That is because if you go all-in, you won't do anything else, ever.
This is because it is very time consuming.
My vacations consist in cutting off from the world and going full hermit while my family is away having regular fun. Running the whole farm is doable but that means you will spend ALL day tending the harvest and animals, maintaining equipment, and running your food storage program. You will need to store food for the winter, you know.
The sad part is that my deployment is seriously engineered, with proper irrigation and anti-weed blankets that keep the harvest areas free from undesirable plants... and it still takes so much fucking time.
I also have my own electric power production, but I consider it more of a luxury. You can do without it in a pitch, but it is so much easier to make homesteading work if you have some power for your freezers.