The issue is that to get to the highest levels, you have to throw hard. Throwing hard will increase your chances of injury. So, the question is, do I want to be an effective, lower velocity pitcher at a lower level and remain healthy, or do I want to risk injury and have the chance to make it to the highest level. Most people will risk the chance of injury for the chance to pitch in the major leagues. Not much you can do about it. Try to find the safest way to throw hard and keep your chances of injury as low as you can. But if you're not hitting that 90 mark, you won't get a chance to show your stuff at the highest level. It's just a fact we'll have to live with I think.