Exchanges are frequently screwing up, and even if Coinbase has been causing actual bitcoin to move from one person to another, it is not like those coins are lost or are out of circulation.. unless some of the hackers (social engineers) might screw up and be able to be traced (or maybe they hibernate the coins), which just means fewer coins on the market, and maybe the hacked person might buy some more coins rather than giving up on bitcoin.  I doubt the news is fluff, since Coinbase has been having a lot of social engineering, and surely maybe it could become more clear that KYC is part of the problem.. so many users who's information has gotten breached.