The difference is that Ford started with something that worked. The Ford T is noteworthy because of the way it was made, not for its abilities as an automobile.
Tesla is starting with something that doesn't work. No one has been able to achieve full autonomy yet, not even Waymo on its own turf, despite Waymo being well ahead of Tesla. I trust Tesla will be able to close the gap and be able to perform to the its current standards without radar and ultrasound, and it would be fine if the current standards weren't terrible in the first place. What I mean is that Tesla is currently at the awkward spot where it is good enough for cruise control, but not good enough to safely take a nap in the driver seat.
As for the "simple solution", you may know the saying "For every complex problem there is an answer that is clear, simple, and wrong". I think it applies here.
Tesla is starting with something that doesn't work. No one has been able to achieve full autonomy yet, not even Waymo on its own turf, despite Waymo being well ahead of Tesla. I trust Tesla will be able to close the gap and be able to perform to the its current standards without radar and ultrasound, and it would be fine if the current standards weren't terrible in the first place. What I mean is that Tesla is currently at the awkward spot where it is good enough for cruise control, but not good enough to safely take a nap in the driver seat.
As for the "simple solution", you may know the saying "For every complex problem there is an answer that is clear, simple, and wrong". I think it applies here.