He is not 'capable of' making those medical decisions himself. [=he cannot make the decisions by himself because he cannot think clearly, he is too sick, etc.]
I don't believe that she's 'capable of' murder. [=that she is the kind of person who could murder someone]
She is one of the most 'capable' [='skilled'] and versatile actresses in Hollywood.
(..) Yes. Mike is fine. Wherever he is. We both know that he can take care of himself. And he's certainly capable to provide for his own family, okay? Jesse? I need you to believe me. Yeah. Like you said. (..)2013 TvShow: Breaking Bad Title: Blood Money Season: 5 Episode 9
(..) except to try to live... ordinary, decent lives. Why Kaylee Ehrmantraut? She needs someone looking after her. Mike is perfectly capable of looking after his own granddaughter. I don't think so. I don't think he is capable. I don't think he's coming back. (..)2013 TvShow: Breaking Bad Title: Blood Money Season: 5 Episode 9