To some extent, they all are, yeah. If for no other reason than from a designer's perspective of "How many cards should I include? How many components are needed? Do I need to change this based on how many players? How long should the game last? How many turns/rounds/minutes? How to I model this to make sure the game is balanced?" etc. I design both board and video games, and these are questions I have to figure out the answers to for each and every game.