The other possibility is he only matches some of these but was ideologically motivated - i.e. he found the role of health insurance companies in society to be egregious. To me that would explain how he was able to act so rational through the whole thing (some people here disagree with me on that though).
If that's the case (which matches up to some of what you've said) I don't really see it as him "wanting to be a hero". There are some people that go and do shit to make the world a better place and he hasn't really left enough shit to get actual fame from it (so far, at least), But maybe that is also just "wanting to be a hero".