As for being in war zones: If you are reporting from a war zone you have chosen a side, you are reporting what the media overlords let you report, what will sell clicks and advertising. It might be the truth as you want the world to see it. It might not. People who find themselves reporting from war zones might be noble people, but they might possibly be also advertising war as much as condemning it. Sorry, this little rant should be part of another thread. Edit: You wrote elsewhere, "I'm not so much scared of death as a too-short life."jobs that I'd really have fun with, and love going to work.
I suggest you make that your starting point in building a life. Figure out what those things are that you love and have fun with. There's no point having a "noble" career if you have to force yourself through the day. Opportunities for contributing exist everywhere and if "nobility" and "truth" are your values, you'll bring those with you wherever you go.