Take your lid off, fit some rigid forks and you'll soon find you're having fun without getting injured all the time. The fact is that humans tend to compensate for safety devices, so if your bike will do 25mph down a section of trail, that's what you'll do on it, so that you get the thrill of danger. On the other hand, if it'll only do 15mph, you'll do that, and still be getting the same thrill / risk of falling off.
You'll probably fall off just as often, but the injuries won't be so severe.
If you find you can't manage that, perhaps you should take up 4 wheeled motorsports. It's relatively rare for people to get properly injured.