Just having a point is not good enough. It needs to make some sense.

China Hing Kong and China Mainland was always a separate entity. China Hong Kong Google site still remains blocked in China mainland (last I checked), because Google refuses to comply with China laws regarding privacy.

Google has other business interest that doesn't require direct access to customer data and products that can be only developed for Chinese consumers.

Google remains the only major company in the world that I know of that refused to do business with China over privacy concern.