Whats the point of a steep seat tube angle?
It is a currently accepted industry belief that the seat tube (one of the tubes bike frame is made of and one to which your seat post with saddle is attached) on a tri-bike should be more upright and forward than on a road bikes. Such geometry places athlete over the cranks further forward and into a more aerodynamic position. Such forward position also saves running leg muscles for the last segment of triathlon while recruiting more quads for generating power during the bike.
