Every generation has some product/ingredient that they didn’t know was dangerous at the time: tobacco, lead, asbestos, etc. What is that item for this generation?
There are studies showing something is causing cancer for almost everything you eat. Wasn't there even a study that showed increased cancer risk if you eat potato chips? Or eggs?
What makes you think there is any correlation between being able to sign up for Lemmy and knowing anything about artificial sweeteners? Those two things seem completely unrelated to me.
Late to reply, but generally Lemmy users are advanced/veteran Reddit users, and advanced Reddit users more or less share a pool of common knowledge based on topics that often come up or were significant, etc. Aspartame is up there with things like fluoride in the water supply in terms of notoriety. Not saying people agree one way or the other, but it should at least be well known that it's controversial.