black dog, I appreciate you concern over "un-deserving" veterans taking advantage of the VA. However, not all injuries are immediately disabling. Some most certainly take time to become disabling. Just because an in-service injury has healed or isn't disabling and doesn't become disabling until years later, should not and does not, exclude the veteran from compensation. The underlying injury has happened. Even if healed, it's most likely not completely healed and susceptible to further injury. Also some injuries can have a sort of domino effect. For example, you injure your right knee in-service. After time, because the knee injury affects your gait, you start having back problems, ie. DDD of the L3-L4. This will likely further affect your gait causing injury to your left knee, but also compress your nerve root at the L3-L4 causing partial paralysis(loss of feeling, sensation of pins and needles, burning sensation) in one or both of your legs. Do you not think the veteran should also be compensated for these conditions arising out of the original injury?
I would like to point out that the DD214 doesn't indicate your medical condition at discharge (unless you're medically discharged or medically retired but will only indicate so, not the medical conditions). Your discharge physical is what indicates, if any, medical conditions you have/had. The VA will look at your discharge physical and Service Treatment Records. Unless the injury/condition has a paper trail leading to your time in the military, a veteran will not be granted compensation for said injury/condition. For those secondary injuries in my example, linking the injuries to the original requires a Dr.'s opinion that they are related. I would concede there are some Dr.'s out there who mainly write IMO's (Independent Medical Opinions) for veterans. I question the legitimacy of these IMO's, as they may not be on the up-and-up and should be scrutinized.
It's not as easy as one would think to get VA compensation. The VA doesn't just nilly-willy grant compensation. There has to be evidence of the in-service injury. If, after time, the injury becomes worse, compensation should increase. Even in your story of the guy doing karate, the VA rates the disability, absent of the effects of being controlled by medication.