A lot advocate for why something is important (for example, it's easy to laugh at a PMS emoji, but it's hard to disagree with "Currently, although menstruation is a core part of being a woman, it is felt to impose significant limitations on women when influenced by negative societal beliefs and taboos.").
Others are longer docs where many included proposals are now valid emojis, and it's interesting to think how some were picked and others weren't.