"Do I have ALS?" as a forum does have real and important functions, even amidst the frustrations.
1. A few folks that come need to know what kind of doctor to be pointed at so that they can start working towards health.
2. Anxiety, both general and health anxiety, are conditions that cause serious life problems. For those whose anxiety concentrates on fears of ALS, there is a donut hole in the medical support structure. The neurologist deals with the physical health, but has no time and little patience for dealing with the emotional response to symptoms. The psychiatrist/ologist in the equation has a little more time, much more patience, but most have not even our layman's basic knowledge of the signs that something isn't ALS or any MND. Oftentimes, for those that do follow up on the mental health side of things, they are sent back to a neuro over a benign symptom due to the psych's own worry. Those that fall through that donut hole end up here or at the BFS boards, but they have to be willing to consider they have BFS to get to the latter. That isn't instantaneous.
3. For those who aren't struggling with health anxiety, the pages and pages of worries that lead no where assure them that tons of people have had their symptoms and are still doing fine. Most of these folks never even post, but they are part of the hundreds viewing at this moment.
4. It allows the moderators to not have to delete a zillion posts that would be offtopic for their forum.