Have a look at this https://www.youtube.com/watch?v=p3ChZziyU6Q&t=15s
Rolling knees and neck is taught in Tai Chi classes by people who don’t have a clue how the body is designed.
How many people who teach Tai Chi have any qualifications to do so, except from someone else who doesn’t have a clue about how the body works either? Think about it!
A good example of how to make a bad back worse is to roll the hips.