It would if the cameras were good enough and plentiful enough and can be rectified. It seems pretty clear from all of the failure stories that Tesla either does not do stereopsis up front to establish geometry at all or doesn't do it enough and instead relies primarily on blackbox identification NNs.

Parallax beyond the distance equivalent to that between the cameras very quickly drops the distance accuracy possible to resolve into the noise floor.

E.g. just a quarter mile is already in the noise.

> just a quarter mile is already in the noise

There's no reason to care about precisely measuring things a quarter of a mile away. Human drivers don't.

You can do structure from motion on a single camera without the need for stereo.