To give you an opinion from someone on the ground in Hong Kong, the zero case policy is very real, and it's strangling the city. Many people are unhappy with it. With an at minimum two week quarantine when you come back to Hong Kong, it's nearly impossible to leave. I myself have three weeks of quarantine coming up soon.

The result of these harsh restrictions is that there haven't been major outbreaks, I think the worst we ever got was about 120 infections daily, and only 213 deaths overall, with the last one being on September 14th.

The downside of this, is that the vaccination rate in HK is very low, because there's no difference between being vaccinated or not. You're subject to the same local restrictions, and subject to the same length of quarantine when you come back.

Vaccination rate spiked up recently, because a new "wave" has started. Newly discovered cases spiked to 38, and the government announced a new two week lock down to squash it. Ironically, part of the new cluster revolves around a party thrown by some government officials and legislative counsel members.

Note: I'm personally very unhappy with the situation in Hong Kong, but try to refer from giving my personal opinion, so it's mostly just fact based.