The Big And Small Of It
As others have touched on, the shear amount of variables are not to be ignored. Baseball, Track and Field, Tennis all have variables too, but Cycling has more.
Let me explain, the added variables of the dynamics of group riding with drafting, weather (hot temps, rain, etc...) long hours and diet during the event is more daunting when juxtaposed against something like Cricket.
Most sports have well defined boundries. First base is so many feet, the basket is so many inches high where as a bike race, the metrics can vary wildly. Cycling attacks, steep mountain passes, heat and cold, support crew, mechanics, equipment, it goes on and on.
Where cycling is like other sports, i.e. where it has more defined boundries is Track racing. You could do a search on their average size and get a read on what type of rider fits that discipline best, but road racing is another animal all together.