Considering emoji are older than many of their users, that's one hell of an assertion.
> In 15 years, we'll be wondering why Unicode is clogged with so many stupid symbols.
Yes because U+1F32E TACO is so much stupider than U+27B0 CURLY LOOP, U+2554 BOX DRAWINGS DOUBLE DOWN AND RIGHT, U+1031B OLD ITALIC LETTER ERS, U+3375 SQUARE OV or fucking U+10472 SHAVIAN LETTER ICE
> I don't hate Emoji or anything
Yes, yes you do.
> it just seems unnecessary as part of the Unicode standard
It's part of messages, being able to display both regular text and emoji mixed together without requiring incompatible custom image embedding extensions is useful and convenient.