The whole thing is about achieving personal power. Mystic power, occult power, mental power, all kinds of power - power to control natural forces, other people, etc. Were we reading the same books?
No, the whole thing is about self sacrifice for the greater good. Given what we know about the prophecies in the book about killing Voldemort there's a good change Harry (if he's the prophecy fulfiller) will be killed in stopping the evil. Not much personal power achievement there. they don't gain mystic power, or occult power, or mental power, wizards in HP are BORN with power and learn to control it.