When you type words, the reader hears them in their own voice, with their own tone. Emojis are the closest thing to facial expression that text has.
'Sure.' and 'Sure 😊' are completely different messages. The period adds coldness. The emoji adds warmth. Same word. Opposite feeling.
Emoji overload dilutes meaning. When everything is decorated, nothing stands out. Use them to highlight tone, not replace substance.
A single 💀 when something's funny lands better than three laughing faces. Precision beats volume in emoji use, just like in words.
Used well, emojis prevent misreads, add warmth, and make you easier to talk to. That's not shallow — that's skilled.