No they don't. Most people have been more than willing to sign up for the easy peasy, pop in the microwave way of eating. lets face it what we called 'cooking' when we were children is now called 'cooking from scratch'
Even in the deepest inner cities there are fresh food markets and they are generally cheaper than supermarkets. DD almost lived off her local vegetable market when she was a student living in Lewisham, that and marked down items in Tesco.
In nearly 60 years of shopping for myself and, later, family, my fruit and veg have usually come from the local market, whether living in London, a New Town, a big provincial town, or now in a more rural area. Since getting my first chest freezer in 1973, my meat has come from a butcher, either retail, wholesale, online, farm shop or producer.
There are even real bakers around, ones who do not load their bread with additives and steam it with a quick bake at the end to tart up the crust.
Supermarkets offer products and if nobody buys them they withdraw them. Look how a big supermarket will have a completely different range of goods in their shops depending on the area and region.
It is too darn easy to blame our bad habits on other people, especially food habits where food is such an important part of our health and people feel guilty for eating 'naughty' things, whcih seems to cover a lot of the food i supermarkets.
Eating well, requires some effort but not excessive and the easist thing to do is stop eating UPFs, read labels., and leave on the shelves those with lots of E and emulsifiers, colours and artificial swqeeteners. The owners will get the message. Read the country of origin on fruit and veg. Demand transparency on the source and breeding methods of themeat you buy - or just go down to your local market, or local food producer and shop there.
I have done this all my life through family demands and a fulltime professional career. It is not particularly time consuming but you do need to expendsome time gettig organised, after that it is sheer instinct.
But do not blame the supermarkets. the choice is in your hands.