This is theory not practice. Banks usually protect their ass and send reports to residence country and to citizenship countryCRS reporting based on the passport is simply not true.
There is a reason why this site exists:
With the aboth given example is it irrelevant anyway - moving out of your Country of Citizenship is the first step all the time.
About Medical Check:
Yes - you have to do a HIV rapid test and Xray shot to see if you are HIV positive or having Tuberkulose.
So better not consider UAE with having HIV and/or Tuberkulose.