This reminds me of something I read in C.S. Lewis which is quite rational: the purpose of curiosity is finding answers. It's not dithering for the sake of dithering, or debate for the sake of debate. The goal is to find out what the right answer is, as accurately as possible, not to eternally keep all the options open. That's how I understand the quote.

Of course, real curiosity can look like dithering and endless debate because people are being very careful not to get things wrong.