In short I agree with rms response to things like the VA. States require a defense force, which require members, and those members will incur damages. That the US mis-uses its military in the minds of many (myself included) doesn't negate the prior reality. Also, care for things like loss of limb or TBI might be long term, but the cause is not due to a repeated series of poor choices stretched out over years.
It's not uncommon for people with diabetes to fail at managing their illness even after acquiring it, and the same for heart disease. To over simplify, there are better uses of public funds than to subsidize poor outcomes in people who, in the face of mountains of PSAs and evidence to the contrary, refuse to alter self-destructive behaviors - behaviors which have zero upside other than very short lived individual hedonistic pleasure.