[AriseAndPass]

Thanks for commenting! I hear what you're saying, but I think it's perfectly possible to injure your back with bodyweight exercises over time. Even if we're just talking about yoga, there's a good amount of evidence that incorrectly practiced yoga can and does cause back injuries over time.

Now I'm sure that the optimal answer to that would be to make sure you correctly practice yoga. But the back is probably the worst joint I can think of injuring, and at the same time I'm basically just watching youtube videos and copying them - which isn't really a guarantee of correct practice. So I try to err on the side of caution by keeping my spine neutral :)