>>46417
They really aren't the average fatsos.
I think in the lower divisions they are too young to be obese, and upstairs you need to be strong. For example their legs/thighs and asses are giant muscles. Quiet a few of them are quick too.
Check out Abi and Hokutofuji both are quick. Or there are blokes liek Hoshoryu or Wakatakage, they are "lean" (they both about ~130 kgs...). Or the tiny ones: Enho and Midorifuji. Best look at them on videos. Search "[name] bout" on yt for example.
Compare them to Takakeisho and Bushozan. Then to Ichonojo and Kaisei. Then Chiyomaru and Chiyotairyu.