I despise anyone who becomes a soldier of their own free will. The moment you enlist, you accept that you will be obliged to kill, and that you will have no control over whether that killing will be justified.

Not true for the USN. They hand you a contract that you sign. You only have to do what is contained in that contract. To change your job they have to get you to sign a new contract. I was never close to combat, and neither would any other Navy Nuke, though they actually left the school for the fleet. I skipped that step. There are tons of non-combat jobs in the US military that will never be anywhere close to combat. Logistics is why our military works. That being said, it’s worse than you are making it out to be. A lot of the people who signed up for combat roles were looking to kill people before they ever signed the contract.