The fact of supporting Ripple by banking systems doesn't make it more centralized ?
And who said that this coin is decentralyzed? The most centralyzed and known coin is ripple and I think we all know it and if we say oppositely, seems we try to lie ourself.
Why did they decide to add crypto on payments? And why did they choose ripple over bitcoin, ethereum and etc? What did they see something unique which wasn't in them?
It's obvious why Ripple is so attractive for the financial sector: this guys can't live without controlling each coin movement.
From other side, such deals are definitely good for crypto marekt, because Ripple is a cryptoasset, even centralized one.