The musing curators only curate answers that are worth being curated. If all the answers that were presented for a question aren't properly arranged and articulated then it's not going to get an upvote from musing.

The key is to put effort into answering the question properly, what matters is how you answer it. At this point musing doesn't have enough experts in every field to know if every answer is correct or not so they focus on rewarding people who make enough efforts to answer a question properly and effectively.

It's also possible that they might have missed a question or two, but that's ok, they're human after all. My best guess is that all the answers for that particular question weren't up to standard and that's why it wasn't curated.