Psychoanalysis was invented almost at the same time in Vienna and a lot of freudian concepts have since been critiqued due to his biases. Does it mean Austria forever owns psychoanalysis and anything that could be discovered since? There is a difference between a field of research, a scientific discipline and a paradigm. Debunking a theory that was invented more than a century ago doesn’t disqualify every research done after that. Also, paradigm change often comes from opposing theories from the same field they oppose. If we did like that, there wouldn’t be a lot of research field left standing.
You accept yourself that osteopathy was able to go beyond its suspicious origin, but refuse to imagine that chiropractice could do the same. Which is why I reiterate: chiropractice requiring no medical training is a north american thing.
You’re just presenting nuanced conclusions as overwhelming truths to put weight on your opinion, while taking a few shortcuts. You’re entitled to your opinion of course, but that doesn’t mean you get to dismiss any contradicting ones by deciding unilaterally what the words mean.
Chiropractice in the US might be just “cracking joints”, but it’s not true everywhere. If you can’t accept that, then I don’t know what to tell you.