People quickly forget many of the hardships their own great grandparents faced.
Source: my parents are anthropologists and I spent a substantial amount of time as a child in the 1990s visiting an indigenous peasant village, sleeping in a dirt-floored hut with a hearth fire nearby, with no electricity and water carried on people’s heads from half a mile away, high infant mortality, belief that diseases are caused by witches (vs. germs), etc.
Their illegalization and displacement by supermarkets has been at least partly a deliberate political choice, and I don’t think it’s an inevitable part of modern life.
(Working as a vendor in a market stall is not necessarily a great career though.)
There are farmers market around my area and my impression is that, if anything, people selling there can be more dishonest than the big chain stores - i.e. they will try selling a batch of bad apples, because they're not wealthy and they just need the money. Whereas big chains have quality standards and will just throw away bad food.
I mean, @Theorentis is correct, in a way, about what's good about less-industrialized societies. Though it was more true of medieval serfs and classical societies than it was of "a few hundred years ago". But also @jacobulus is correct about the down-sides.
And when you say "pre-WWII", that makes me think of 1850-1950, which I suggest is, overall, literally worst-of-both-worlds. There's virtually no decent medicine until 1928, but industrialization and capitalism are in full jackbooted swing. You get all the psycho-social disadvantages of modernity, with virtually none of the benefits.
The feudal system is often given a bad wrap, but after reading "The Servile State" (a critique of modern capitalism) I actually think we have much to learn from it that we have lost.
It persisted because there was not sufficient economic surplus or a sufficiently broad distribution of economic/social power to break the control of the armed thugs running things, except sometimes by other groups of armed thugs.