Beyond the reasons mentioned in the Op I find a much important factor that keeps gamblers skip the KYC process is the fear of governments. Someday if governments request to submit the data of each and every user, our information gets revealed with the
amount wagered in total. Some foolish governments might also levy tax taking it as a proof of spending though most games lost.
It's not really about the gov't but it's simply because we don't want to be exposed and we don't want the casino itself to know who we are.
The reason why we used crypto to gamble is because there's no need for certain documents to verify in able to gamble.
And if we use or Concord to their rules and regulations that make gamblers to submit their KYC then the sole purpose of cryptocurrency will be defeated. Things like anonymity will be defeated and information can be exploited nfrom gamblers to their disadvantage, personally I will be associated with such gambling platform's.