[whatshisface]

You don't get to know in advance which questions will pan out into answerable ones. You could answer "why should there be a why" to literally and question about why. In fact, you could have said that about the motion of the planets, right up until Newton - which shows that the category of things that can be answered like that contracts over time.

[gpderetta]

That's a how, not a why. Asking why is it worth the trouble ascribes intentionality to the universe where none is expected