Yes without a doubt. I hate that any kid gets hurt playing sports. I have never really had an injury that sidelined me though my brother and both of his kids have had numerous "serious" injuries.
My youngest nephew took himself out of football after getting a concussion. Not out of fear of it happening again, but out of fear of not being able to play basketball or baseball. Both of witch he has a better opportunity to play at a higher level.
Used to race motocross too and man was it fun and exhilarating. I saw one kid go over the handlebars and head first into the next jump breaking his neck. It was surreal. I saw plenty of other pretty severe wrecks and injuries too, even in person at pro races. I still wouldn't discourage my kid from racing either.
Regardless of the sport so many are going to be involved and so many are going to get injured. A law of averages if you will. We either take the risk or we don't. Its not going away. I don't begrudge anyone who does not want their children involved in dangerous sports, but I would not keep my kids from participating (given the coaches are well trained and teaching proper tech).