I don’t have any fundamental issue with emojis when they’re used to expand meaning or provide clarity. Eg you could use an emotive emoji to show/clarify the intent/emotion of something. Imo, using emojis in this way is no different than the practice of adding a “/s” to denote sarcasm. When they get annoying is when they’re used superfluously. If they serve no purpose, then it’s just clutter.