Pet peeve: while I really like the general point of the article, I wish the author had actually provided statistics that support the claim they are making here. 30k suicides sounds like a lot, but what's the base rate in the general population? The numbers provided don't actually tell you whether the rate of military suicides is higher than civilian ones, and that kind of undermines the point. To be concrete I'm looking for something like "the base rate of suicide is X% chance per year, whereas amongst soldiers it's Y% chance per year, suggesting a risk factor of (Y-X)% caused by military service."
A quick search finds some research (https://en.wikipedia.org/wiki/United_States_military_veteran....) that suggests the rate of suicide among veterans is 1.5x the base rate, which is substantial. Using those numbers suggests that 10k of those suicides quoted above were specifically attributable to military service (and 20k would be "baseline civilian risk of suicide").