If you defeat one then it's gone and it can't cause anymore trouble. [Though it wouldn't take long for another Spot to come along and replace is anyway.] They attack and hurt people, they aren't things that are meant to be kept. It's better to fight them so everyone is kept safe!

[He's not sure why anyone would ever want to keep a Spot, that's like practically asking the Spot to turn your body into a nest for more Spots.]