When a pitcher throws the ball in the dirt the umpire takes it out of the game. If the batter hits a ground ball why is it also not taken out?

A pitch which hits the dirt often becomes discolored or has scuff marks on it due to the nature of the soil material around home plate. This happens at a fairly high rate of speed A batted ball in the infield usually hits grass first and at an angle that these scuff marks do not occur. A ball that is chopped and hits the HP circle is taken out of play. This is more so in the major league ranks, then in HS, college, or low minor leagues, where baseballs are at a premium.