1)Peasants absolutely exist. There's an enormous invisible labor force in the US that is paid a fraction of minimum wage, let alone a living wage, and that's not even counting the literal prison slave labor employed in multiple states. Further, while the US may export a great deal of food, there are plenty of food types and a majority of manufactured products that are imported from places where they are made through the exploitation of third world laborers.
2) Your claim that business-ownership used to be a widespread individual experience is historically nonsense.
3) The article is full of tautologies like "If you have the human and social capital to start a business, it means you don’t have to worry so much about money." Yeah, if you're rich enough to not have to worry about the world crashing down around you tomorrow, you're rich enough to not have to worry about the world crashing down around you. Brilliant insight, and also not the lived experience of 99% of the world's population. Your suggestion that people simply "choose" to be this way is ridiculous.
4) The assertion that middle-class people spending a majority of their income as it comes in is "cultural" rather than a reality of saving being a LUXURY afforded to the few wealthy enough to afford it is both wrong and incredibly insulting. You're hardly the first person to perpetuate the "poor people just don't have good money sense" myth but it doesn't make it any less noxious.
And that's just for starters! Wealth is a zero-sum game and capitalism is built at its very foundation on the upward mobility of wealth through exploitation of labor. You can't change that with fairy-tale ideas about everyone magically being able to afford the risks and costs of business ownership if they just want it bad enough.