There are so many reasons why, from the revolving
Aerobar that lets you have a drink in the sky, to Dances With Robots that literally sees you sitting in the hand of a giant robot arm and being hurtled around at crazy speeds.
Most start on a road bike for a few seasons with clip on
Aerobars, they are more comfortable and easier to ride (I did my first three years including two Ironmans on a road bike).
Instead, I am considering alternatives such as installing a pair of
aerobars on my bike that would bring my elbows closer to my body decreasing the wind drag while increasing my speed.
(2,10,11) Also, the biomechanical position adapted while cycling, forward lean posture with arms on the
aerobars of the bike, further increases the compression in the perineal region due to pressure from the nose of the saddle.
Competitors in time trials use
aerobars on their bikes instead of normal handlebars.