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.