From a business perspective, penetration testing helps safeguard your organisation against failure, through:
Preventing financial loss through fraud (hackers, extortionists and disgruntled employees) or through lost revenue due to unreliable business systems and processes.
Proving due diligence and compliance to your industry regulators, customers and shareholders. Non-compliance can result in your organisation losing business, receiving heavy fines, gathering bad PR or ultimately failing. At a personal level it can also mean the loss of your job, prosecution and sometimes even imprisonment.
Protecting your brand by avoiding loss of consumer confidence and business reputation.