You never heard of ACL injuires, much either. You never heard of a lot of things, medical advancements have changed the entire world. Instead of listing someone as "crazy" we can isolate and help treat certain ailments and diseases specifically.
Your logic is often scary, I do not know who you are beyond your screen name, so do not get offended when I comment on this, much of the things you say, I dunno. I may need to go cool off as well.