One man's treasure is another man's trash.
It's just that the 'soldier' analogy is always thrown in to the affray in these instances, and:
The soldier is being paid to do what he does. He is aware of the honour that is bestowed upon those who do such things, he is brainwashed (indoctrinated) into having a raised sense of patriotic pride. He does have an inherent sense of duty to his comrades (family). Ultimately, though, he is protecting what he loves.
That, which we love, we posess, as it posesses us. Ergo, he is protecting what is important to him: Preserving himself.
So what he does - he does for himself.
This is not selfless.
No act can be performed unsubjectively. It has to be first processed by the consciousness of the actor - So all acts are a reflection of subjective progression. Subjectivety Rules!
Have a nice day!