Most questions that come to mind aren’t grand or conceptual in any particular way; they arise in a much more preliminary stage of the learning process, as we try to understand the details of going from point A to B. It just wouldn’t be productive for all of our hands to shoot up when the professor asks “Any questions?”, only to go over a certain part of the lecture over again.
Sometimes, I tell people my favorite color is silver and they retort, “Silver is not a color. It’s just a metallic gray.” Then I tell them my favorite planet is Pluto just to yank their chain. (Do people still say “yank their chain”?) But my favorite color really is silver, whether it’s a “color” or not. In my head, I treat it as a color, and more importantly, I treat it as my favorite color. Of course, that could be construed as a very egocentric way to look at things, but at some point, everyone does have to decide what they believe… about colors.