You're giving an example that validates my point. Existing technologies already have widely variable delays (radio vs broadcast TV vs cable TV vs sattelite TV)

You're giving an example that validates my point. Existing technologies already have widely variable delays (radio vs broadcast TV vs cable TV vs sattelite TV) and yet they're all in wide use. And you can't compare directly the 30s I suggested (end-to-end latency) with the 3 seconds of latency differential between technologies. It's probably less than that but it's possible your neighbors are in a 30s delay and you are in a 33s delay. And if the problem was actually that serious it would be easier to fix it by just adding additional delay to the faster technologies instead of having to reduce latency in internet streaming at huge cost.