Possible future scenarios, even highly plausible ones, do not "utterly address" my immediate practical objection about where many of us actually live. And I still don't think busses will ever be a perfect substitute for having your own vehicle. Indeed, per your arguments, if I'm ever living in "sufficiently dense urbanization" I very much expect to rely on an ebike or somesuch.
I'm strongly in favour of e-bikes, they're a highly appropriate solution.
They don't suit all needs, however. The elderly, young, disabled, or ill, for example. There are circumstances in which transit fits needs better, particularly for longer-distance or high-volume commutes. Bikes need less parking space than cars, but still require parking. Bike-share or similar solutions only partially address this given high-demand peaks and low-demand troughs. Weather and geography work against bikes in many places, electrified or not.
Low-headway rail, trams, and busses are still one of the most effective means of moving large numbers of people and baggage over intermediate distances.
