The three pillars of sumo are shin-gi-tai, which translate as heart-technique-physique.
Heart is the most important as a strong fighting spirit can make up for deficiencies in the other areas.
Sheer size or wide-ranging technical abilities on their own can get you pretty far in sumo, but likely not to the mountaintop.
With your current subscription plan you can comment on stories. However, before writing your first comment, please create a display name in the Profile section of your subscriber account page.