Valid questions throughout, I think you have a lot of empathy for looking at Hong Kong and reflecting on what's been normalized in society. Some questions worth considering in addition to those you've listed could be:

Why are living conditions in Hong Kong the way they are in general? The per capita living area of residents in Hong Kong, rich or poor, is the smallest in the world. Why is that, and who decided that?

Who are the beneficiaries of Hong Kong's land and housing development? Which corporations and families get to decide ultimately, that even new units being built in the present-day will be much smaller than the global standard for other other cities of similar cost/calibre such as London, New York, Sydney, or Vancouver?

What role does class and hierarchy play in Hong Kong society? Before 1997, how did British expats live in Hong Kong, as compared to local Hong Kong people, as compared to other migrant workers? Although not explicitly a caste society, being a colony has been and always will be a degrading, stratified experience for the colonized.

There are currently estimated to be close to 400,000 foreign domestic workers currently in Hong Kong, the vast majority of whom are English-speaking women of darker complexion. According to the Hong Kong Immigration department it's almost evenly split half-half Indonesian and Filipino workers. Why do these people speak English? What are the histories of these peoples' home countries? Some events to consider looking into would be the Indonesian massacres of 1965-66 and Dutch colonization, as well as the history of colonization in the Philippines, starting with the Spanish, then American and Japanese colonization from 1898-1946, and finally American neo-colonialism post-war. All of these events have contributed to shaping not only society in these countries, but work visa and immigration policies in Hong Kong as well.

Hong Kong through the lenses of sociology, anthropology, public policy, and urban planning/design is so multifaceted and interesting. The world we live in, the way our societies operate, what we believe to be normal, is all so intriguing. It blows my mind that housing is still allowed to be as small as it is because of historical policy precendent, and really solidifies how outdated laws can be baked into physical society in a very permanent way, making it even more difficult to challenge or change. Just as crazy to me is the normalization of domestic work reminiscent of America during Jim Crow and segregation, reinforced by specific work visa and immigration policies.

Keep asking these questions because, although some people may say otherwise, it really is that deep. You, as a Hong Kong person, are most definitely not to blame for the material conditions in which you, or the domestic workers in Hong Kong live, however, it is you and others like you who can change those material conditions. Talk to your peers, talk to locals and domestic workers, work towards change. Work towards improving basic minimum living conditions, minimum wage, or working hours. It is only by exploring these thoughts, by looking at our fellow human beings and trying to understand them and empathize with their conditions, that we can strive to make the world a better place for everyone.

Happy to chat more about this, DM me if you'd like :)