Evolution isn't aimed.

I realise that, but the use of tools and sharing of ideas may well have had advantages against the T-Rex. Just as I'm sure they've helped us against things that would eat or kill us.

We seem to be the only animal that solved "scavenging is dangerous" and "hunting is hard" with talking to each other rather than by getting bigger and getting claws or vicious teeth

Right, but why are we the only ones to solve it that way? Some lesser "dinosaur" could have evolved tactics to fight bigger predators through basic weapons (sharp sticks), but no evidence of that exists.

An advantage is an advantage, so I think it's reasonable to ask why mammals and not murder chickens came up with it.