Rapper 50 Cent did a terrible job of throwing a ceremonial first pitch for the Mets. I have terrible accuracy throwing - baseballs, snowballs, darts, anything - but would not do this badly. Most American girls, putting the wrong foot forward and not used to throwing overhand, would still do better than this.
It causes me to wonder if the baseball culture of America produces better throwers of small objects, so that even below-average Americans are far better than throwers of other nations. I don't even want to get into spears and atlatls, thanks, though you can if something clever occurs to you. It intrigues me because of hobbits, known for their ability to throw stones accurately. Tolkien did not come from a baseball culture. But he did come from a cricket culture, another overhand-throwing sport. Jamaica, where 50 Cent is from, does have cricket but has never been big in the sport, even on a local, West Indies level.
I wonder if Tollers, though not an especial cricket fan, just naturally thought that boys, and thus hobbits, grow up throwing hard objects and imputed that ability to his fictional race, even though it is an unusual ability historically and geographically. It carried over into the D&D rules, where halflings continue to get a racial bonus in throwing.