Why you use graphics in games?

No, graphics do not make a better game. The gameplay, controls and story make a better game. Sure, good graphics are nice but they don't make a better game. If the graphics are bad, maybe even hard to look at, but the controls, story and gameplay are good, it is still playable, and can be fairly good. If, however, the graphics are really good, but the story is boring, the controles are too stiff or loose and the gameplay is terrible, the game becomes unplayable.