I would say it's extremely important. First of all, we want the individual to get treatment. If they don't see a doctor they're not going to be treated, and it's going to be difficult for them to get better if they're not getting the medication and the psychiatric or psychological assistance they require.
As you rightly state, if there is no documentation that the person has suffered an injury, then when they apply to Veterans Affairs for benefits, of course, it will be more difficult for them to access.