What theft?

It seems that the latest fashion crime is Catalytic Converters.  This story says, ”

It takes a trained mechanic, like Oli, up to three hours to remove a converter. Thieves have been seen taking them within seconds. . . . .

Excuse me but where is the theft here it takes a trained mechanic up to three hours to remove 4 bolts? At how much an hour?

I have to wonder what the mechanic was trained to do? Certainly not bolt removal!