[vasama]

That's sort of like asking a motorbike enthusiast why they don't just drive a car instead.

There's a big difference in the input scheme between PC and consoles. Playing with a controller might not be satisfying for someone used to keyboard and mouse. The latter also provides a higher skill ceiling for competitive play.

The lower end hardware used in consoles also does not allow for high framerates and high resolution monitors, while with PC gaming one can get as much performance as they're willing to pay for.