I mean I do ballet and use this tape on my ankles and neck. It helps a lot with any short term pain. If jimin was suffering from chronic pain, I don't think he'd be performing as much as what they are, no doctor would allow it.

Also, jimin is a grown man who probably knows his limits by now. He is also surrounded by the other members who would tell him to wise up if he was going too far. He is surrounded by doctors/PTs constantly who are there to maintain the boy's health