I think Bezos is wondering how society will respond. It is up to us. Some will welcome this as an improvement in delivery efficiency and service. Some will say it will make our cities crowded and noisy not only on the streets with cars and trucks, but in the sky too.

I like my blue silent sky. I recall scenes of sci-fi worlds like the 5th Element. I suggest we tax externalities. If you order by sky, you'll create visual and noise pollution to many people, and you should pay a tax for this, to be shared by the community as a whole.

My take is that Bezos wants to see how society will respond to this. A high tax would kill his ROI, and he won't invest much in R&D. If we say "Nice! We want this" he will double down.