Dogs get bred for specific personality traits and to develop physical traits. My border collie was a maniac that just wanted to work all day every day. That herding part of his personality was extremely prevalent. Even if I tossed a treat on the ground, it never would occur to him to use his nose, he'd frantically look all around. Even if it was right under his nose if he didn't see it then it's as if it didn't exist. Likewise, from 1000 yards away I could make subtle hand jesture and he knew to go get his ball that was 1000 yards in another direction and bring it to me; over half our communication was body language and it even had context. Like if we were out somewhere and he was off leash, also 1000 yards away, I could nod my head slightly and he knew it was time to go and he jumped in the truck. Same head nod elsewhere meant something else. It's hard to explain but that was the most connected I've ever been to another creature (even my wife in many ways if I'm being honest, he never misunderstood me :)).

Likewise, I now have a golden doodle. It's like having a giant 5 year old puppy. They've been bred to be docile, kid friendly, playful, cute, non-shedding, and the perfect family/instagram dog. But they're extremely dopey when compared to a border collie.

I'm not sure what cats get bred for. Fur length? Ability to shit in a box? I'm guessing they've not been bred too much on their personality, which is why they are mostly the same and still miniature tigers.