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.
We once had a customer on a project that we'd messed up. I told the customer I was sorry about that and that I'd make an effort to fix the problem. I could see they were happy to hear that. But afterwards my manager called me at home and got mad I'd said sorry to them. His philosophy was never to apologize. Funny thing, later on that customer offered me a better paid position...
