Problem with other average gambler or small time gamblers they are over exaggerated on things which is manageable with. Besides if they are playing on reputable casino then there's really no problem with this, maybe we can only got an issue if a new casino will ask this requirements and hold our withdrawal for questionable reason then maybe for that we might gonna face more trouble with them.
Whenever you sign up for any new casino you should always do extensive research about it like read reviews from different sources and also have a look on their T&C while you register over there through which you will come to know about KYC but with small amounts you can start playing to check for any issues.
True this is a good step in understanding the policy of the casino and if in case there is something we do not understand, we can always reach out to customer support to clarify things we don't understand. Rather than asking anyone outside the company staff, it is best to communicate with them directly so that we can get the real facts and stance of the company about the things we do not clearly understand. I have lots of experiences on members that often ask people who are not connected to the company and it often ends up in more confusion.