If a car could arrive for me to drive it at that time and place that I need it (and depart to another client when I'm done), that could be perfectly efficient... but curiously this business model doesn't even nearly exist. There are too many other things going on.
Among my greatest shocks when I recently visited the states, were the inability to get beer delivered to my home, or easily find a cab just by walking to an intersection.
Would the comparison of Istanbul to New York City be more appropriate?
Which has more political pull, New York state or New York City? NYC isn't even confined within NY; the Chinese system of "cities of a certain level of significance are their own state-level entities" seems to make much more sense (to me) than the US model does.
Usually, I would have to call a cab or use Uber. That's fine, but it seems different from the "just need a car when I need a car" observation that invited my quip.
You can also often order delivery from grocery stores (Amazon Fresh and Instacart well known for this, but in my experience most grocery stores run their own delivery businesses that you can ask about.) If the grocery store is permitted to sell beer (they are not in some states, such as Pennsylvania) then they will typically happily deliver you beer if your total order is over a certain dollar amount (typically $50 or so).
Also, just about anywhere that beer is sold in the US, you can get a keg delivered to you. Of course most people don't want a keg unless they're having a party.