I haven't read all the details, but what I have read through squares with my experience as an LMT that's worked on a lot of hypermobile people, particularly EDSers (and also, well, with being hypermobile myself). The principles actually apply to people who have straight-up EDS as well, it's just... that you often have to start using them on a much, much smaller scale than most physios have ever been trained to do so. (As you may have seen kaberett discuss, recently.) And of course there can be and often are co-morbidities that complicate things further still.

(My actual suspicion would be that the physios who are the most likely to be at all useful to EDSers, especially early on in building strength, failing having found yourself the beautiful and wondrous unicorn of ones who specialise in hypermobile patients and have familiarity with EDS, would be those who specialise in geriatric populations. As that's another population where yes you often do have to start very, very small in terms of building strength up, so the idea that, no, you can't start with that much weight, no not even THAT much -- or little, rather -- would be less new and Now I Have To Educate My Own Goddamn Medical (Para-)Professionals In Order To Stop Them Fucking Injuring Me. *wry*)