Target Hardening may work in some cases, but it is likely that it will not deter all criminals. When criminals face difficulties with executing their crimes or consider it too risky to perform, they may look elsewhere. This means that their crime has not bene prevented, but moved.
Tougher imprisonment shows society that crime is taken seriously, and that criminals will face consequences for their actions. This helps to remind society that criminal behaviour is not tolerates and deters people from committing crime themselves.