I don't understand why things have to be one way or other. Childcare is not the same for everyone, it's a series of choices depending on the situation and values held. Nowadays, some people want everything, career, kids, time to play so that often require paid help but it's a choice. It's also not necessarily true that your career takes a massive hit if you take time off, it really depends on your field. Almost all of my close friends(male and female) have taken some kind of parental leave(all professionals)and all have done well and have held or now holding senior positions.
I also had a good friend that was a single professional working parent with two kids and she managed incredibly well with very minimal support. Her kids were very independent helping with the cooking, cleaning and other household chores and she got them involved in competitive sports which was a form of childcare. Basically, everyone adapts to their situation and do what they have to do to make it work.
If people prefer to stay in HK to have domestic helper and a certain kind of lifestyle that they may not have elsewhere, it's also a perfectly valid choice and I see nothing wrong with it. There are advantages and disadvantages with every choice and I don't see why others should make judgment on choices they don't have to make.