If the Beijng government refuses to allow casino gambling in Hong Kong, then there isn't anything we can do or say, but if it was a Hong Kong decision, then it is another matter.
Macau's gambling revenue exceeds Las Vegas' by far. I bet 90% of that revenue is "drained" from Hong Kong economy and yet Macau is the sole beneficiary.
Are the Venetian, the Wynn, the MGM Grand Hotel & Casinos really smokey opium dens?