Smaller animals have a higher power to weight ratio than larger animals, because strength scales as a quadratic function and mass as a cubic function.
For the same reason, smaller weightlifers snatch a larger multiple of bodyweight than bigger weightlifters. At the Olympic level it goes from about 3xBW down to 1.6xBW depending on weight division.
Also, humans are upright bipeds in a body that has the architectural hallmarks of a system for quadripedal locomotion. Cats have not compromised those advantages: we have.
Yes. Proportionally, tigers can't jump as high as their smaller cousins, can't run as fast as their smaller cousins and unlike humans still use quadripedal locomotion.
For the same reason, smaller weightlifers snatch a larger multiple of bodyweight than bigger weightlifters. At the Olympic level it goes from about 3xBW down to 1.6xBW depending on weight division.
Also, humans are upright bipeds in a body that has the architectural hallmarks of a system for quadripedal locomotion. Cats have not compromised those advantages: we have.