Honestly, if a player's intention is purely playing on the casino, the wagering requirement for withdraw shouldn't be a problem. It is mostly a problem for people who wanted to mix their coins to remove traces of their history.
I believe that a 1x wagering requirement is sufficient to prevent money laundering and coin mixing, as many reputable casinos with excellent services have high requirements. During my research I discovered some casinos that only require a $20 bet size before permitting withdrawal using the same deposit method which i think is an excellent approach to prevent these issues and gain more players. A 1x wagering requirement is also reasonable and equitable since depositing $100 necessitates playing at least 10 times with a $10 bet size.
Wouldn't it depend on what country the casino is registered in? I don't really know how the specifics works but I reckon the more prevalent money laundering is in a country, the more strict they are with regards to methods they can use to launder money, hence stricter requirements. Might be wrong though so feel free to correct me.
The main problem is that not all casino stated this rule clearly in their terms and conditions page. In other words, it is something like unwritten rules. Maybe by this thread, all casinos that has no written rule about this case will start to write it down in their terms and conditions although most people is not reading it prior to registration. In case of change/modification of such rule, casinos should announce it publicly or inform their players by email or other ways.
Pretty sure that a casino that doesn't state their withdrawal requirement isn't a casino you should play on in the first place? And this thread opened by OP actually has the wagering requirements in the T&C of the casino, OP just didn't bother checking it as he said in his 2nd post in the thread iirc.