Nobody can "control" exactly where the ball goes, but many RH MLB hitters used to be able to hit a ground ball to the right side on a hit and run at a rate considerably higher than "random chance."
The idea that a LH hitter can't learn how to consistently bunt hard down the third base line, or regularly take an outside pitch to left, is pretty questionable.
The thing is, somebody has to decide things like that are important. That swinging from the heels at every pitch, in any count, in any situation, isn't the best way to play offense.
Somebody, somewhere will, and soon. And it'll take a little time, but it'll work, and all the analysts at Fangraphs will marvel at the new way to play. Which won't be new.
Shifts didn't just happen recently because nobody thought of them before. They wouldn't have worked, because players could handle a bat.