Baseball, yes, to a degree as the most difficult feat in professional sports is consistently hitting a professionally pitched baseball. Outside of that, it's a rather pedestrian set of physical skills in comparison at least on the individual basis (and I have a great appreciation for baseball and baseball players).
I certainly agree with your position about the most difficult feat in professional sports. As an example, Michael Jordan, a great athlete and at least average in the outfield, looked like a low grade bozo at the plate when he was trying to "make it" with a pro team in AZ.
However, among the best baseball players, I see their other skills are anything but pedestrian. The long-time standard for a good player - "run, field, throw, hit for average and for power" - means:
excellent speed on the base path and at your position - a very quick start and ability to cover ground fast and under control;
to field the ball quickly, control it immediately, and do the correct thing with it NOW (e.g.: try shortstop like the good ones);
throw the ball far, with a flat trajectory and hit your target accurately (especially outfield, catcher, third base and shortstop);
and the outstanding hitting speaks for itself.
Some baseball games can seem slow and boring, but excellent individual plays are anything but pedestrian to me because very few people can meet that noted standard.