Earlier quoted context omitted.
Correct me if I'm misrepresenting you here, but are you claiming that the reason that something is invented is always the reason why it continues to be used?
Now it's probably because people don't like "traffic" outside their homes, but basically yes, that's why single-family zoning is still in place. It's extremely silly to want to ban eg corner stores in your neighborhood. In SF where people have discovered "left-NIMBYism", people will now argue that keeping it is fighting racism, but then if you go into the suburbs they'll still happily argue the original position.
Consider the microwave magnetron: invented to mess with radar, but now in every kitchen.
Maybe the reasons haven't changed in thisinstance, but holding that as a rule seems pretty incorrect.