Hitting a golfing hole-in-one is harder. But both golf and baseball are stultifying to watch.
I disagree.
#1. In golf, the ball is stationary. In baseball, it is coming at you at different speeds and moving up/down/in/out. In baseball once the ball is thrown, you have to make a decision to start the bat in milli-seconds. You can address the golf ball until the cows come home.
#2. You cannot get a hole in 1 on a par 4 hole...so the object is not always to "get a hole in one". All holes in 1 are a matter of luck...not skill. All homeruns are not lucky swings.