My father placed me as the beneficiary on his retirement application, is mom right to be pissed off at him?

A couple months ago my father filed a social security retirement form online and he's waiting for the update. He placed me as the beneficiary in the event he were to pass away.

My mom isn't just upset with him. She's super furious and at this point doesn't trust him anymore. She feels devaluated/not trusted as a woman, as a wife because she would've placed him as the beneficiary if she were filing her form. Is she right to be super pissed off?

Updates
+1 y
He also placed me as the one in charge of making medical decision in case he can't do it himself. She's pissed off at that too. She's so furious with him at this moment. She doesn't want to speak with him now.
My father placed me as the beneficiary on his retirement application, is mom right to be pissed off at him?
Post Opinion