The first two examples that you've cited are great. Those people were dismissed at the time — only for scientists to find evidence decades later after many deaths.
re: gulf war syndrome
> Studies have consistently indicated that Persian Gulf War syndrome is not the result of combat or other stressors and that Gulf War veterans have lower rates of post-traumatic stress disorder (PTSD) than veterans of other wars.
> In 2022, researchers led by Robert Haley, MD at University of Texas Southwestern Medical Center found that exposure to sarin nerve gas in soldiers who had a particular genetic mutation that prevented them from breaking down the nerve gas is likely to be responsible for the syndrome.[18] The findings and an editorial by two leading epidemiologists were published in Environmental Health Perspectives.[19]
re: 9/11
https://en.wikipedia.org/wiki/Health_effects_arising_from_th...
> More people have died from illnesses caused by 9/11 than during the attack itself.[3][4]
> Much of the thousands of tons of debris resulting from the collapse of the Twin Towers was pulverized concrete, which is known to cause silicosis upon inhalation. The remainder consisted of more than 2,500 contaminants,[7] more specifically: 50% non-fibrous material and construction debris; 40% glass and other fibers; 9.2% cellulose; and 0.8% of the extremely toxic carcinogen asbestos, as well as detectable amounts of lead and mercury.[8] There were also unprecedented levels of dioxins and polycyclic aromatic hydrocarbons (PAHs) from the fires which burned for three months.[9] Many of the dispersed substances (asbestos, crystalline silica, lead, cadmium, and polycyclic aromatic hydrocarbons) are carcinogenic; other substances can trigger kidney, heart, liver and nervous system deterioration
Most long COVID is likely not psychogenic.
The difference between those and more fringe stuff like chronic Lyme disease is much more of a grey area than most doctors would ever admit publicly without a huge amount of well organized backlash that largely can be summarized on “you just don’t care about sick people”. So the alternative is much more palatable to just to quietly treat them, play the game by kicking the can and deferring with “I hope science will one day advance to finding a real cause”. Wikipedia is always going to play this same game by the nature of it being a public forum attempting to appease a wide audience, it’s almost always going to play it safe.
Ultimately these are people, for the most part, who are legitimately unwell and may legitimately need care regardless, but that doesn’t make it the same as having cancer or HIV. Nor does it mean going to a doctor will give you the medicine you need.
which is completely real and scientifically verified, despite your scare quotes.
I might add that nothing in your link claims that Gulf War Syndrome is psychogenic.