Tying up some loose threads...
As I've said elsewhere, orgs (charities etc) need to work with the photo libraries to identify and correctly tag suitable images. Many media orgs will have subscriptions with preferred libraries, so it is difficult to get the press to use different sources without a lot of input and education.
When I was at TL, I used to produce the weekly round-up of articles called the "Talking Points" page, so I would often need to select suitable photos to illustrate topics (if the article itself didn't contain a figure I could use). From my experience doing this, the editor will search the photo libraries using terms that *they* think will best illustrate the piece to their readers.
So for ME/CFS, they are likely use "fatigue" or "tired" as search terms (because that's what they know) - hence the proliferation of pics showing desk workers with a headache. And yes, if the article mentions "exercise", they'll use a pic of someone jogging up a flight of stairs.
Therefore, even if you make sure that more suitable images - i.e. here:
https://phoenixrising.me/stock-photography/ - are tagged with keywords like "fatigue" etc - you still have the task of getting the editor to use them in preference to the usual head-clutcher.
One of the best photos I saw used recently was this one: https:// www. gettyimages.co.uk/ detail/news-photo/an-in-home-nurse-cares-for-the-mother-of-the-photographer-news-photo/1226511210 [eta: I've broken the link because something keeps trying to embed it!]
Unfortunately, it was used for a Spiked article about whether "Long Covid is even real".
So while it's all very well trying to get the images out there, and tagged properly - and we should definitely be doing that - getting them to be used is quite another thing entirely, and will require a lot of badgering and education.