This makes Dragon more grounded and, at the same time, less interesting of a character.
He started the biggest counter-WG organization in recent history and became the world's most dangerous man not because he learned the true history, hidden from the masses, not because he discovered a secret king perpetrating genocides from the shadows, but because... he saw how corrupt the CDs are? And--maybe--had his wife kidnapped by one of them?
When you put it like this, nothing separates Dragon from any of the current Marines in terms of insight. Dragon was simply the one willing to do something about it, while Garp turns a blind eye in the name of balance, and Akainu still considers the pirates more dangerous than the elite.