@m_ashcroft The problem with waiting is that you can screw up the muscles/tendons in both legs because of what you have to do to compensate. At least, that’s what happened to me, YMMV. If you make it to your 80s, you won’t be a great candidate for surgery, regardless.
@Discollaborator Rabbit is label for a general group of biological structures. When you take it apart, rabbit goes nowhere, as it’s a label. Label changes to reflect new structure. For looser definitions of “rabbit”, it’s still there.
Step outside wherever you are. Pick a direction. Go until you find something you can do to help someone. Do that.
It sounds like pandering but when society shreds, the only medicine is mending it. And that takes thinking about how you help move the needle, not just the board.