Because playing a game of football requires:
friends who want to play and have time to play
space enough to play in
setting up the game
organizing the game
time to organize the game, get to the place to play, play, and get to wherever after playing
physical effort
a ball
A video game requires:
console
game
Because cooking requires:
recipes
ingredients
tools
storage for ingredients and tools
preparation
that the person is in a kitchen
cleanup
time to decide what food, get the ingredients for the food, prepare to make the food, make the food, serve the food, and clean up
people to eat the food.
Playing a video game requires:
console
game
Because playing a real guitar requires:
guitar
lessons to learn how to play
time to practice until level of playing is presentable
sheet music
And if the person wants to sound good:
other instruments
people who play them well, have time to play, and want to play
Playing a video game requires:
console
game
special controllers
I know this may be a shocker to a lot of people, but rock music has more instruments than just guitar. For example, there's trapset, keyboard (with voices to sound like something else), and miscellaneous percussion instruments. Playing any instrument alone is rather dull, let alone one that practically everyone plays for popularity reasons.