Earlier quoted context omitted.
The spiritual community believes that fluorinated water is toxic and damaging to the brain, causing calcification to the pineal gland (the third eye, source of DMT, the spirit molecule), suppressing the innate psychic abilities and spiritual advancement of the masses. Believe it or not, this is a tremendously large portion of the population.
I find it fascinating how many medical "problems" we (Western medicine) have that are perceived differently by other cultures and faiths. I do believe what you say. Presumably Lithium deficiency is something which does not serve ones ability to contribute to our modern economy as much and therefore is seen as being a negative.
Another big problem is stress, caused by competitiveness in the western world. When you have a mental illness, you can't compete, and that alone is another stress factor. (Some people will perform better, but by far the most will not.) In a low stress low competitive environment, if you can't deliver, don't have a high performance job, it's not that bad. You're one of the many, just one with a few quirks. You hear voices, so what. I guess if it's not that strange to hear voices, you don't have to hide it, and stress goes down, resulting in less voices, etc.