So much hate for new emojis. I rarely use them unless iOS suggests one to me that I think fits well enough. I can see the new yellow emojis being useful. Regarding the breast feeding emoji, I think that one conveys more information than most emojis. If a mom, for example, sends just that to her partner or two a coworker, there is a lot that the recipient will understand in that moment. The mom is busy, she maybe even stepped away from work quickly to pump, don't disturb, awake in the middle of the night, etc. I prefer helpful emojis like the breastfeeding one over random ones like a dinosaur.
The hate allows people to feel good about themselves, by giving them a little bit of power in their lives that is otherwise lacking.