For a lot of people? Yes, this is not intuitive. If a user wants to "save a file" then why do they have to press the "print" button and select a "printer" that's not actually a printer?

Saving/exporting as a PDF should be something you select in the same menu as saving a file normally. Or at least something very close an obvious.

Also, back when a lot of people first used computers the option to print as pdf might not have been available for them.

How quickly we forget the dark days before PDF print drivers.