Stock Photos Are Terrible at Depicting Illness, Mental or Physical

But this is by design, not unintentional. Even charities willingly participate in it coz apparently it's been shown that people will give more if they can "empathise" or are at the very least not disgusted by images. The truth simply wouldn't raise as much money, at least in the opinion of those commissioning such things.

I don't like it, I think it's dishonest, but dishonesty seems to be the way things work these days.