There a lot of factors that cause someone to be attracted to another person. The media loves to emphasize how important our looks are, that way we will continue buying hundreds of products to keep our faces smooth, our nails long, and our mustaches non-existent. But what attraction really means at its core is that somebody is literally pulled towards you like a magnet. Something about your energy attracts them and they want to be closer to you.
This Reddit thread capitalizes on the non-physical traits people are attracted to in a person. I would argue that, to many people, these characteristics are far more important than looks. This means you may have been a 10 without even knowing it.