Ask HN: Why do fast food companies get away with this advertising?

This guy walks into a bunch of different fast food joints, orders food, and then asks them to re-make it to be closer in appearance to their advertisements.

https://www.youtube.com/watch?v=XrZFM2nvLXA

It got me to thinking ... if this were any other industry, this sort of advertising would be beyond the pale.

Imagine if a car manufacturer advertised their cars looking glossy and well equipped by default, and then when you turned up to the dealer, they were half-painted, rusty, and missing half the kit featured in the ads.

How is it that this seems to be okay for fast food manufacturers? Or is it done in all industries, and I'm just being blind to it?