as someone who has subscribed to this belief for a very long time but have had difficulty explaining it and only recently seen it pop up amongst others (twice in a week now): we use "you" because there isn't language capable of describing it. You found yourself conscious, you don't remember anything before, won't remember anything after, your consciousness inhabits a vessel but is property-less, theoretically this consciousness is capable of "finding itself" in another vessel. In fact, it's guaranteed because you can't be conscious of not being conscious