Not so sure about the first part actually. Yes, the idea of RenPy is easing the creation of VNs but people made very un-VN-like stuff over the years and we can even make this go further. It is possible to make a calculator in RenPy. Not the best way to program a calculator for sure, and probably not the most comfortable calculator to use later on, but a calculator it would be. And as countless students will attest to, that ain't a game
Completely agree about the question of text amount being removed from any "game or no" discussion though.