It's too bad, because "I'm sorry; this is my fault" is the biggest diffuser of anger and best way to appease mad customers. Try it sometime; the other party goes from ready to kill you to apologetic themselves (if you're genuine). Unfortunately it's seen as a sign of weakness by people like Elon and his cult of impersonators and an admission of liability by the litigious crowd. If you can be strong, confident and ready to admit it when you're wrong you'll not only be successful in confrontational situations but also not a giant dick.