What does it mean to die for someone's freedom? I would say that if someone is protecting your freedom, in any sense, and they are killed for that, than that person died for your freedom.
Now, I have some personal experience and education in this. I'm going to address the US Navy specifically, because they are perhaps the most visible use of force protecting freedom.
The Navy has several main objectives besides out-and-out war fighting. Power projection, forward presence, freedom of the seas, etc. The US Navy is heavily involved in drug interdiction. It is also mainly responsible for any sort of freedom of the seas. 90% of the world's goods are transported by sea. They protect shipping lanes and respond to incidents at sea. Piracy, accidents, drug cartels, etc. The US military is also the #1 disaster relief organization (for lack of a better word) in the world. Do you enjoy chatting with strangers on the internet about soldiers? Because the Navy also protects under-sea fiber-optics cables. These are every day freedoms which you don't stop and think about, because you take them for granted. Mind you, these are freedoms for all people, not just the US. Ghana, Greece, Vietnam, etc. all enjoy the freedom of the seas that is for the most part maintained by the US Navy.
Do sailors, soldiers, airmen, and Marines die performing these tasks? Yes. They do. Training accidents, piracy raids, accidents, enemy fire, etc.
Now, do we fuck up? Yes. Look no further than the Middle East. Is every action of the US military some grand protection of freedom? No. The military gets sent where the politicians send them, and I don't think anyone honestly trusts politicians as a whole do to the right thing every time. But there are genuine times where American men and women die protecting American and other people's freedoms.