The truth of the matter is that all of those mentioned jurisdictions require cryptocurrency exchanges to implement KYC/AML policies. Perhaps the only difference, like Curacao in the issuance of gambling license, is that they aren't strict in its implementation.
Not necessarily true. The fact is that most of the platforms you mention have crossed paths with law enforcement from Countries like the UK and US. SEC and CFTC does not want any of them letting US residents use the platforms, or they will face more lawsuits and fines, so these platforms are forced to implement KYC verification to sieve off users from countries with hostile crypto regulation.
Just check the terms and condition and see if Binance for example bans users from the Seychelles Island.
https://www.datawallet.com/crypto/binance-restricted-countries