I find emojis almost - but not quite - completely useless.
That said, they are a part of Unicode and as such should be included with every modern platform.
As to some of the complaints above: Not a single programmer spent any time making these. Artists are drawing them and adding them to the appropriate font and that's it.
Apple has more than enough money to pay both, programmers and artists. So nothing is lost by adding emojis for people who like them.
The size they occupy is also insignificant in times where a single photo is measured in tens of megabytes.
And if you hate emojis so much - just don't use any!
True, but then there is also the resources invested in implementing a facial motion capture system to animate emoji, and adding a second mini screen to laptops where one of the demo'd use cases was emoji selection.
Apple of course has the resources to spend on trendy things as well as a strong, usable foundation. But I'm positive I'm not alone in feeling that foundation is eroding while also getting more and more cluttered with these more superficial features.
I won't claim to armchair CEO exactly how Apple should approach satisfying both camps, I just wish I could also see some updates that that made my devices feel faster, more efficient and reliable. Or simply not feel worse performing and then be told "well that's the cost of all these flashy new features!"