How many people are clueless about cars beyond the basics?

I'm in a few Facebook groups for the vehicle's I own (all Toyota/Lexus hybrids) and it baffles me how many people that bought these cars not knowing anything about them. It then had me thinking about some friends I have. Two have hybrids that didn't know there was an engine in there. Another bought a fully-loaded Camry XSE V6 (paid extra for driver assist features) and has no clue how they work. Doesn't even know what the windshield washer function is.

It has me wondering if people know anything about a car beyond PRND (some probably don't know what neutral is) and putting gas in it. How many people do you know like this?