your typical business isn't working at the same level of the maslov pyramid than a farm. I don't want a world where only the wealthy can afford to give milk to their kids

I think because farms need to be a certain size to be effective. And, even though they might be worth a lot as real-estate, the land could be worth millions, the people farming could be poor.

Guess, to your point. If a family owns a dry cleaner, similar situation.

Because when the US was settled (not that long ago), 90%+ of people were farmers.

Now the East and West coast voters see no value in these farms so want the government to tax them away. They also naively think that the local farmers market can supply the country's food supply.