Everything else remaining the same, you may be wrong. Here, there is no danger at the speeds Indian traffic moves at, that was a sped-up time-lapse. The cyclist was on the wrong side of the road.

I don't know about Hong Kong - more than absolute space, what is the population density - but I imagine control over all the aspects makes for parts that fit better together. Over here, there may be a case for smaller roads planned better, mini buses instead of buses, etc. But the buses already exist. The land is already owned by somebody before they laid down roads. Designed around all that, it isn't that bad.

We have so much infrastructure at the per-capita income levels as they are of a billion people. This isn't something to fret over.

I don't see it. A roundabout would eat into space vehicles need. And roads were laid in and around land already owned by people, so it wouldn't have been a clean slate.

Traffic only flows 3 ways: bus goes on straight, bus turns left, and traffic from that road on its left goes straight. The cyclist should have come on the other side below the elevated road, and turned under it to reach this intersection.