When I ask “why,” it isn’t because I’m arguing with you. I’m not using it as a back door to disagreement. I ask because if you don’t know why you’re doing something, then you don’t know if you’re doing it right.
“Why do you want to build a garage,” isn’t me saying “building a garage is a bad idea.” It’s me saying “If you don’t clearly define your motivations and desired outcomes for building a garage, then you run the serious risk of building a garage according to some generic default assumptions that won’t serve your actual goals.” Maybe you want to have a garage to house all your hobbies, but one of your hobbies is fishing, and if you don’t think about that then the default garage size isn’t big enough for your boat, and you’re not helping yourself.
The point is, ask why. Examining the things you want to do is even more important than examining the things you don’t.