I can agree that once you've picked up a few different programming languages with different paradigms (functional, OO) you can probably pick up another adjacent

I can agree that once you've picked up a few different programming languages with different paradigms (functional, OO) you can probably pick up another adjacent language on the job pretty quickly. However: "Furthermore, if you really want a C++ developer you can just expect a developer to learn C++ on the job if they have any adjacent experience with any other language." C++ is an exception. Too many foot guns.