Are you claiming that your brother has scars covering a majority of his body from a single encounter with a domestic cat? Given "scars all over his body."
Cats are animals. There are ways to approach them the same way as other domesticated animals.
And cats can be great with children. It just takes training, much like training them to be in a house.
Or you can hack off their fingers.
When the cat attacked him, he literally sunk his claws to his torso and started running across his entire body. We had to throw a blanket on top of the cat just so he would stop. I agree that there's certain ways to avoid stuff like this, but there's lots of times where an animal can misinterpret things and attack on instinct.