I assume this is being downvoted because arguments like this are usually either no-true-scotsmanning or borne out of elitism.

However, what is true is that "video games" are so variegated as a medium that it's probably worth splitting it up into multiple mediums, in the same way that television, short film, and feature film are all considered different mediums despite being largely the same in many ways. If The Godfather and Caillou are different mediums, then Red Dead Redemption and Candy Crash can also be different mediums.

It's not that candy crush and other casual games aren't real games. It's that the modern versions currently in the app stores aren't games. Original versions of candy crush, angry birds, etc. have been removed. What is available now are time-gated gem stores. Maybe 1% of titles aren't reskinned clones that can be played more than 5 minutes straight.