There are a number of different questions there.
Here are my beliefs, from the bottom up:
-I don't think we subconsciously pick cards. What you do, hopefully if we are paying attention, is to close off our minds and follow our intuition that will always bring up the right card. So my belief is that the right cards always come up....as long as we were paying attention and not totally distracted or something in which case we might just get random cards with no meaning,
-There IS however a real danger that we can misinterpret what the card is actually trying to say about how someone feels about us IF we are really concerned about the answer. Strong emotions can taint what we see in the cards, and biais the answers we see.
-IF the person does not want us to know, then the cards can and will just tell us that. This has happened to me a number of times...The cards just told me that they could not give me an answer and the querent was not meant to know what they had asked. The cards CAN and DO do this at times. I have seen it before a number of times. If we are not meant to know, we will be told so.
-IF you ask what someone feels for you and the person has no feelings for you, the cards will then tell you that. If you ask what they have been thinking about you this week and they have not been thinking about you, the cards will usually tell you that. Although at times when we ask that kind of question I have also seen the cards just refuse to answer and nonsense cards have come up. As if they were saying there is not logical answer to that so we will not even try to answer. Try again to rephrase it properly and then we will; try again.
-Another good plan of action though is to notice and recognize when the question you are asking contains and unproven premise in it. Eg what has Joe been thinking about me this week, when you cannot be sure he was thinking about you at all. The phrasing of the question is very important to the way the answer will come out. For sure, if there is something illogical in the question, you can't expect to get the best answer. If it makes any sense at all. Like asking if Joe stopped hitting his wife yet and he has never done so. There would be not logical way to answer that. A good question needs to be logically phrased.
When you come across that kind of question, it is best to first verify the premise. FIRST ask the card to tell you IF he was thinking of you , and then you can ask what he thought. Although some people find this question immoral altogether and will not ask about others' thoughts and feelings at all. For me it depends.....on the motive of the querent....
So I guess that is my answer. The answer will be accurate if the reader can keep there feelings and emotions out of it, if the question is well and logically phrased, and if the reader is focused when they pull the cards. That said SOMETIMES the correct answer IS that the querent is not meant to have the answer to what they have asked, for varying reasons. Sometimes that is just the true answer.
Babs