There's no societal problem of hidden deaths because of fermented foods. But assuredly there is because of "safe" ultra-processed convenience foods.

The societal problem is that we have low quality food. Across the board. Every where you go, all that's available is mostly low quality.

The option to spend more money, or have your own garden, or do some kind of home production is a vanishingly insignificant individual action that solves nothing except for like 11 people.