@martismartis. It is not really the same. Why would I have to go thru NXT and multigateway when there are already reputable tumblers out there? Also the volume and amount of coins the tumbling service will really matter so that the mixing of the coins will become more effective. I believe the coin shuffling service is not really used by the bitcoin users so there is reason to believe that the volume there is low.
Reputable tumblers can keep logs of in and out addresses and can be honeypots to collect a database of such transactions. Nobody knows who operates them.
NXT coin shuffling is decentralized, no logs, no operator.
Your reasoning is again the same. Everybody uses bitcoin mixers - so they must be good. Everybody uses banks - they must be good and then we don't need cryptocurrency.