because they ♥♥♥♥♥♥♥ sumo wrestle while still in arm and leg casts ♥♥♥♥'s ♥♥♥♥♥♥ but also they don't get diabetes because they mostly eat sausages and meat and their natural enemy is the demons who they purge from the ring via throwing salt because the demons are the spirits found in margaritas and then they die because most sumo wrestling matches end with at least one large fat guy being tossed as hard as possible off the edge of a raised platform into the first row where people who don't know why the front row seats at sumo wrestling matches are ♥♥♥♥♥♥♥ cheap HINT: it's the flying propelled aerial dropped tumbling huge fat bastard that'll fall on you hope you like thicc couse you're gonna get high impact physical twerked on m8, and when you're 800 pounds dry and can destroy forklift trucks with your ass hitting a row of hard seats with sticky out arm rests leads to you eventually ♥♥♥♥♥♥♥ your spine up so most sumo wrestlers spend their final years hospitalised and get urethral infections that make them piss sausages and meat to complete the circle of life.