Meanwhile, 9 years ago in China, people were already receiving this kind of therapy, but nobody believed them[1]. As Gibson has said, "The future is already here, it's just not evenly distributed."
In my country (Ukraine) stem therapy was used first in 2005 to recover broken bones. Now it used frequently to recover wounded soldiers (they already helped dozens of soldiers with astonishing results, like in article).
I also remember reading, in China, poorly executed stem cell therapy had lead to tumours in some patients. I think there is some merit to a more cautious approach.
Yeah, wanting reasonable evidence before believing in the casual relationship between two events is fair.
But in this case, the Redditor can't provide scientific proof, because he's a layman. What he can provide is evidence that he couldn't walk, received stem cell treatment, and then could walk.
90% of the top level comments effectively said "No, impossible, there must be some other reason that you can now walk". That is to say, they feel that because there's no evidence that it's possible, it's impossible until scientists prove that it is possible. Well no, that doesn't make sense and it isn't usually how things work. These people's small amount of knowledge of the scientific method has caused them to arrogantly discredit potentially real phenomenon.
What's interesting is that one of the main top level comments which says "wow, I had a feeling this would be possible" is from an actual stem cell researcher.
I looked at that thread, and the non-negative-score comments seem to range from credulous to reasonably skeptical, with none that are fairly characterized as "No, impossible!"
In fact, given how sketchy the poster of that thread was being (e.g. linking to his non-medical blog when asked for medical details and saying he's too embarrassed to talk about it when asked again), I'd say people were pretty generous.
[1]https://www.reddit.com/r/IAmA/comments/k1hts/i_am_a_28yr_old...