Yeah so of course I don't know why, lol, but I'm full of opinions!

I'd think that subconsciously asking why implies misunderstanding, well imply might not be the right word, it basically says "I don't get you." Therapists seem to try to stay attuned constantly, and project that they understand so it seems like this could leave a person feeling a bit hurt. Also like someone else said, a person might feel defensive like their decision was stupid or nonsensical.