The funny thing about conspiracy theories is that they can be mutually exclusive, almost entirely wrong, and still be approximately right.
Maybe it’s the seed oils, maybe it’s the sugar, or the processed carbs, or the fluoride. Maybe it’s the vaccines, or the air pollution, or the water pollution. Maybe the lack of nutrients in our food or the endocrine disrupting chemicals in our plastics.
Regardless, we’ve made tremendous unintentional changes to the chemical environment that we inhabit and the fact is that we lack the measurement precision to tease out the effects from the noise on timescales shorter than a human lifetime.
Perhaps the real conspiracy theory is not that we’re being poisoned by something in particular but rather that we’re being poisoned and we have no idea by what and maybe won’t know for a hundred years and this is just the cost of industrial society.
We don't have enough studies or evidence, but we do have our subjective physical experience. And that pretty much tells us what is healthy or not for the most part. Our back aches when we sit for too long. We feel depressed when we doomscroll and sit inside. We feel like shit after eating processed food. We can sense that plastic isn't great. We know noise over long periods of time drives people crazy. We feel the rush and crash of our glycemic index.
It's like when we pretend that our ancestors had no idea smoking was bad. They weren't stupid and could instantly deduce that inhaling smoke was not great for you. Later on, we got a more precise idea and probably the same will happen with our current problems. In the intervening time, however, we can pretty much deduce what is wrong other than the more diffuse threats such as lead or radon.
On HN, the purple-haired priesthood will quickly [flagged] you, because your claims are not in line with orthodoxy and doctrine supporting $LATEST_THING.
The question was "how those are [considered] conspiracy theories".
Answer was implying that they are not, but "try introducing evidence supporting them", and see what happens -- that's why the original poster's implication that they are "about conspiracy theories" is assumed, in the first place.
None of these are "conspiracy theories". They are testable claims -- that you are not really allowed to discuss, even on HN, where one would assume testing claims is expected and allowed.
Some of these might be false. On HN, unfortunately, we'll never be in a position to know...
And sometimes -- forceful claims that evoke "that's ridiculous -- HN is better than that!" responses are a good way to lead people (perhaps such as yourself) to the next realization: Holy smokes -- even HN now suffers from "Eternal September", and we need to work hard to eject those who now control the debate to such as extent that discussion of anything they believe is in support of a "conspiracy theory" is verboten.
It's just the cost of favoring corporate profit over the well-being of people. The rhetoric above was invented by the same assholes who convinced us plastic recycling mattered.
Point to a communist society that did a better job. These chemicals are the metabolic waste of the modern world. Probably inevitable in aggregate if not on a case-by-case basis.
Maybe it’s the seed oils, maybe it’s the sugar, or the processed carbs, or the fluoride. Maybe it’s the vaccines, or the air pollution, or the water pollution. Maybe the lack of nutrients in our food or the endocrine disrupting chemicals in our plastics.
Regardless, we’ve made tremendous unintentional changes to the chemical environment that we inhabit and the fact is that we lack the measurement precision to tease out the effects from the noise on timescales shorter than a human lifetime.
Perhaps the real conspiracy theory is not that we’re being poisoned by something in particular but rather that we’re being poisoned and we have no idea by what and maybe won’t know for a hundred years and this is just the cost of industrial society.