The expected event count from 17,000 people exposed to a month of constant uniform event risk with an annual hazard rate of 20 per 100,000 per year is 0.28. The p-value for observing a count of 5 from a (Poissonian) mean of 0.28 is 1 in 100,000. So it's pretty unlikely by perfect random chance.
The other thing you see in a life spent in count statistics is a lot of statistically extreme events that turn out to have no deep or predictive significance.
There's many slices of ~10-20k people you can divide the US (military) in, many of them overlapping.
What is the chance that in some year at least one of the slices will say "Hey, we had excess suicides!" - much higher.
Yes, it does skew male, but you're probably looking at 10x the standard population density of Autistics, and 20x the density of trans women.
I'm sure there are other "sociologically valid" ways you can measure this too, but there is absolutely a correlation between having the type of brain that is able to perform offensive cybersecurity operations and mental illness/social rejection/isolation.