This is a silly analysis because the conflict is fundamental. China wants to integrate Hong Kong. The protestors want independence. Neither side really wants an indefinite half-hearted autonomy, although the protestors are pushing to preserve it for as long as possible.

Your very reaction shows where your sympathies lie, which is very laudable, but are you willing to engage in 'conflict resolution' over your own core values, e.g. to give up some amount of democracy or independence? If not, then talk is simply window dressing, or an opportunity to spread your message.

Both sides here realize there is no true basis for negotiating, hence why they don't.

In fact, negotiation at all by Beijing would be a concession: it would legitimize the protests and give protestors a formal seat at the table. You may disagree with that starting point, but let's admit that negotiations themselves are not a neutral act devoid of consequence, hence why actual diplomats spend enormous amounts of time discussing the agenda to be discussed in formal settings: what gets talked about and by whom matters.