Emoji was originally added because of Unicode's mission. It wasn't some rando who thought, "we should put a smiley face emoji". It was because Japanese phones used JIS encodings that had them in it.

Emojis seem very much like a net positive in terms of getting developers in western nations to think about support for non-Latin characters.

Poop emoji might be dumb, but it doesn’t seem to hurt anything and if it makes developers support Unicode better, awesome.

I use the poop emoji often, I don’t see anything wrong with it. Sometimes it’s faster to convey an idea with that than with a sentence.