Now you're just making stuff up again. Nobody can actually prove that any form of sentencing can deter a crime because you can't prove why something didn't happen. But think about this, if you happened to see a stack of cash sitting on someones abandoned desk at work and you looked both ways and then shoved it in your pocket and took off, that's theft. If someone walked into a bank, pointed a gun at a teller and made off with a sack full of cash, that's also theft. Who do you suspect goes to jail for longer? A harsher penalty for a harsher crime, even though in one sense they are common. And yes, harm to communities, not only to the individual member of that community targeted by the crime, and also victimless crimes, such as graffiti on a Mosque, is tracked.