Plenty of things can be a “real condition” without measurable physical sources. That’s just practical/pragmatic medicine. Ala chronic fatigue syndrome.
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.
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.