This is theory not practice. Banks usually protect their a*s 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.