Hi P...
Non-credentialed people can counsel all they want; otherwise ministers would be "unethical," cops would be unethical, school counselors would be unethical. Confidentiality rules do not apply to them (except in the penitential confession to a priest or minister).
Ummmm no. Ministers should not be counseling unless they are trained professional. School counselors have master's degrees in counseling and are board certified. Cops are not counselors and should not engage in such a thing.
Confidentiality rules do indeed apply to school counselors, law enforcement, and clergy. And common decency requires confidentiality regardless of the rules.
Now if you are talking about sharing ideas, giving opinions, helping as a friend or whatever fine. So long as someone doesn't pretend to be a counselor and is clear they are NOT a counselor then sharing ideas and chatting are fine.
But counselors are professional, nationally board certified, and typically members of the American Counseling Association which has very strict rules regarding ethics. I'm sure you can find the ethics guidelines online.
~dancer~