Our ability to identify things that might shorten our lifespan has far outpaced our ability to apply that knowledge usefully. For most of human history you ate what you could and hoped it didn't kill you in a few weeks. It was only relatively recently we even had the capability of discussing things like long term cancer risk or what not.
There’s a tshirt idea
If we accept non-scaleable methods then household chickens are great. They keep pets away from gardens, it reduce the need to cut grass, and they are much better than composts. Naturally this method is limited to people who own a house and have garden/outdoor area that is suitable, and where local government allows it.
An other great but non-scalable method is to eat anything that is invasive or which population is a major threat to bio diversity, assuming one do not cultivate or raise it. There are some obvious risk of perverse incentives, but it can be utilized to benefit the environment when done right.
I suppose your comment is more of a moan against what you perceive to be "the elite"'s (the rich, the media, the Davos class, etc) fearmongering, but hey, we're not designed to survive infinitely anyway...
[1] https://www.bbc.com/future/article/20230103-how-plastic-is-g...
All available information sources are full of bullshit and conflicting information too, so good luck quantifying any of the available information on hazards.
Frankly, ignoring it all and just living a reasonable life with reasonably low processed foods seems about right though.