This thread really is a re-run of all the previous ones. it's a fascinating glimpse into not wanting to let go of a belief.
Yes, Diet Sodas might eventually turn out to be unhealthy when new science emerges, but you can make that argument for just about anything. "It's only healthy until it isn't, and so I am gonna use that sthick to not have my belief system challenged".
But right now it is the most well-documented nutritional substance in existence.
Since stress, lack of sleep and a host of other reasons are clinically linked to overweight and poor health, spiking insulin levels, increased appetite and low blood sugar, I think condemning diet sodas (and thus make people stressing over it) is bad.
If you feel personally that diet sodas are bad because you experienced that on your own body, it might be a self-fulfilling prophecy. You have a perception on something, and the mind pre-emptively creates a response to simulate your perception. We need some solid studies that prove it, because everything so far has been debunked or failed to accurately create a link.
There are websites like this, Sweet Poison, dedicated to spreading the word of how dangerous it is. The author got "Aspartame Poison" in 1991 and made a book about it;
http://www.sweetpoison.com/
I don't think coming to the defense of artifical sweetners is the same as saying that its a substitute for water. Nothing will beat water.
It's just that it is a pick your poison.
But if that opinion is uninformed- Like with a lot of the GMO debates- AFAIK GMO-Threads on GAF goes the same way as diet soda threads, as acupuncture threads, chiropractor threads.
On one hand you have people who are not willing to engage with anyone if they cannot prove it with links, and on the other you have people who tell how they feel, what they saw, and what they have heared.
And that's how a lot of these threads go down.
There are so many things human beings shouldn't do. Things we do because it causes a change of state, and causes endorphins and thus good feelings. It feels good to drink alcohol, to drink unhealthy caloric drinks, to stress off when smoking, to trip out of your mind doing drugs.
But we all know that most people aren't like that.
So I believe it's about picking your poison. If you have a unhealthy thing(s), then try to counter it in other areas of your life and moderate the damage.