Memorial Day honors the marines that died in Chattanooga too. Why is dying here more significant than dying over there?
Lowering the flag doesn't imply that these deaths are any more or less meaningful than others. But, like so many others, context only matters to you when it's to your advantage.
Service members who are in a combat zone when they are killed are not less valued than the people at the recruiting station. However, the deaths in a combat zone are more expected, and the people killed, in general, are combatants, armed, and ready.
Here's an analogy. A policeman arrives at the scene of an active shooter and is killed in the line of duty. Another policeman is attacked in his home, while he is unarmed, and killed in cold blood. While both deaths are tragic, and both officers are valued equally, the second shocks us more.
So yes, flying the flag at half staff to commemorate the lives of service members who died when they are at ease, and supposedly safe makes sense to me.
Must you always be obtuse?