not sure this is related to adhd i’ve seen people without adhd who need to know why  i’m also the type to need to know why but i’ve learned to accept lack of understanding as it is a very important skill however it is very difficult sometimes  people have different cognitive mechanisms to retain information relationalcausation i’m making this up is just one way just like some people rely on visual auditory mémorisation to retain information some have relied on understanding the more you rely and use a system the more you depend on it and the more your ability to use your other mechanisms shrink  this is all speculatory and from self-analyzing i’m no expert please do your research and read books on cognition