You're missing a piece of the sentence which goes "that you can trust". There are going to be jurisidictions that will attempt to withstand pressure from places like the US and Europe when it comes to submitting financial information, but one by one they are likely to fall. America, whether we like it or not, holds the ultimate power when it comes to deciding who can access the global banking system - which also includes some of the key exchanges that customers will use to fund their crypto gambling accounts. There might be a small proportion of users that can navigate around that restriction, but casinos are always targeting the low hanging fruit or high volume players and plenty of those will want direct funding through the website. There is potentially a future which will get harder and harder to use crypto casino sites without submitting this kind of identity documentation.