It's well known though that military have issue with their members dying or getting injured specifically on motorcycles.
You can make the argument and say "not all military members" or "i know so and so who's military and he's safe and I trust him" or "they're physically trained and disciplined so they should do better";
But the statistics are there that this is a population that dies specifically on motorcycles; probably worse than how male teenagers are statistically the ones that get into car accidents.
Not making it up, here's link to first article I googled from as far back as 2008. Marines even recognize the issue that it's killing their members, and began efforts to reduce it.
http://www.cnn.com/2008/US/10/30/marine.motorcycles/index.html?eref=onion
When I took my MSF course, the instructor off-handedly mentioned this thing as well, about the other courses he was instructing for military audience.
I won't try to recap any of the reasoning or why, google and you can find loads of articles on military dying on motorcycles.
But because I know this statistic, I can't help to color this specific incident where being military was likely a contributing factor that added to the deadliness of the situation, rather than something that reduced the deadliness.
Just like if the situations was about teenage boys in a sports car dying in a car crash at midnight, you'd all say, well duh to be expected.