All those car companies use A LOT of robotics, automation, and simulation to build cars. They just don't seek for an autonomous sentient humanoids as means to it.

They all have their own predecessors to things like NVIDIA Isaac used for things like worker toolpath planning or for absorbing worker height variances. They just don't use artificial robots with those systems, but use human laborers.

Anyone with even workshop level knowledge or experience in robotics knows we are minimum one whole decade away from humanoids building cars, let alone economically, and there's not going to be much first mover dominance advantages carrying over from doing pre-viability humanoids.

And so they just, keep raking in money from robotics assisted and hand built hybrid cars. Some more some less.