Your examples of "choices made as an adult" (religion and joining the military) are quite commonly not choices, nor made as an adult.
Most kids are introduced to being religious because their parents are, and in those scenarios the child doesn't get to make an informed decision about whether or not the religion is something they want to be a part of (I don't think I need to explain why this is).
Similarily, you can join the military at 16 in North America, before you're legally an adult. People are also involuntarily conscripted into the military in some countries (like South Korea and Switzerland).
If you want to argue that it "doesn't count" when you're a kid or something similar, then you'll have to also explain way a child can change to become less violent or "less religious" and why an adult, for some reason, cannot.
So yes, your opinion is naive. It's missing all of the complexities of human society.
Most kids are introduced to being religious because their parents are, and in those scenarios the child doesn't get to make an informed decision about whether or not the religion is something they want to be a part of (I don't think I need to explain why this is).
Similarily, you can join the military at 16 in North America, before you're legally an adult. People are also involuntarily conscripted into the military in some countries (like South Korea and Switzerland).
If you want to argue that it "doesn't count" when you're a kid or something similar, then you'll have to also explain way a child can change to become less violent or "less religious" and why an adult, for some reason, cannot.
So yes, your opinion is naive. It's missing all of the complexities of human society.