Everything we do and usually want to know about in life involves other people...it's not about prying, but knowing where we stand..Does he love me ? Am I wasting my time ? Is there another woman ? I really can't see how questions like these can be unethical, it's only human to ask questions like those, whose answers touch us directly, and affect our lives so deeply
And this is your opinion but not the opinion of everyone..
Myself, I read for the person who is asking for the reading and I ask them to make themselves the main focus of the reading.. Yes, stuff about other people they are connected to may show up in the reading but that is not the same thing at all as reading
about someone else.
If their question is about someone else then I work with them to find out exactly what they really want to know and we work together to rephrase the question so that they are the focus of the reading..
In my world, the only person I can really change is myself so knowing what someone else is doing in their relationship that doesn't concern me is no use to me at all.. How I deal with my feelings about them or their other relationship is useful and that applies to people who come to me for readings too.
And to top it off, I don't think a reading about someone who I'm not really connected to will even work.. I see loads of 'what does he think of me?' questions in the readings forums these days and I can't see how those questions are useful or even how you'd do them.. In my experience, tarot is not a mind reading tool and doesn't work well when used as one.. I think a lot of problems people have with tarot stem from their unrealistic expectations of it.