since I like you, I'll give you a genuine answer.
There are literally thousands of things you take for granted today simply because someone before you wanted to know "why".
Maybe 10,000 years from now, thanks to the knowledge of knowing why the earth is round, humans are able to rebuild a new earth after our population reached the 500 trillion mark.
I can't think of any reason why we shouldn't care about the why and how of the universe other than the standard selfish, lazy answer of "who cares, you'll be dead in 100 years any way"