I completely agree with you.
It wasn't so long ago that British Airways made female uk based cabin crew retire at 35 or when they got married but male cabin crew were allowed to carry on until retirement.
This practice only stopped when the law was changed.
I am shocked that BA still think it is ok, in this day and age, to discriminate like this, even if these HK girls did know about it before they joined.
Doesn't make it right. They should be able to retire at the normal retirement age.