It is funny, while different many games also have similar challenges. One of the hardest things to do is hit a fast ball. It is because like cue sports, you are hitting a round object with a round object.
I don't think You understand the 'Physics'!
Once again!
"They are the Only 2 games where a single player propels a ball with a stick"!
Baseball, Tennis are
'Reactionary' games!
A huge percentage of the effect of the Bat & Tennis Raquet' come from the ball towards the player at a high rate of speed!
In Golf & Cue games, the player has to
'Generate' every 'mph' of speed to the ball!
BTW, which is More difficult. There is really No 'One on one defense in Golf! IMPO, the 'Elements' are the Defense!
But, In Golf the player always has '14 tools' to help with Most every shot that comes up!
Now days, in Pool the players have '3-4 Tools' at their disposal! In 3C, we Only get one!
Some days in Golf as in Cue games every shot can look/feel very difficult, the other days no shot looks/feels that way!