This is a very preachy old film, with the fundamental conceit that in a world of soap on floors and whaling (?) ships, inside your "living room on wheels" is the safest place to be.

The narrator also spends a lot of time wistfully imagining an "automatic driving mechanism" that would eliminate human error and make driving truly safe.

Clearly, this fim was made by time-travelling robot cars in order to prepare mankind for eventual enslavement.