And nothing in this quote is about the reason he fought; just that he was.
"What do you know? We don't all have the luxury of deciding when and where we want to care about something. Suddenly the Rebellion is real for you. Some of us live it. I've been in this fight since I was *six* years old. You're not the only one who lost everything. Some of us just decided to do something about it."
So, again, not a contradiction.