The discussion on why HKer's were/are not getting vaxxed (The elderly are the longest holdouts) has been explored as nauseam, as I said, we know the reason's why, and there are several other big ones you've not covered.
The long and short of it is that these are the locals attitudes (to school closures.... and vaccines, and masks and freedom of choice etc etc etc) and local HKer's are responsible for them.
They reap what they sow.