Bringing the matter to the public stage and attempting to hold Beijing accountable is the best available option.
Will this influence Beijing? I don't know, but I doubt it.
Will 10 or 100 instances like this, or disputes in the South China Sea identify Beijing as a bad actor? Yes.
I don't disagree with where you are coming from, but it sounds like you are endorsing giving up.
Matters such is this will take decades, now is not the time to give up for the Hong Kong or Chinese citizens that seek freedom.