What must the world be like to a creture with the sensitivity to detect things like cancer with their nose? If we had such olfactory strength, would our eyes even matter much? Sometimes I wonder how mankind survived. Our senses are weak compared to most animals, we're weak (get in a fight with a raccoon if you don't believe me. If you survive with your face still attached, you'll be lucky), slow, and not especially agile. I mean, look at a simple squirrel. They can leap well over their own height, run along the top of a fence and grab onto a tree and scamper up it in seconds. It's the sort of thing we fantasize that elite ninjas could do after years and years of training, and every squirrel does it as just part of their day.
But with a human brain and an opposable thumb, who needs to be the fastest, strongest, most agile creature in the jungle? An arrow or a spear makes a great equalizer.