You’ve very badly misunderstood both the original post and the subsequent discussion.
No, they’re noting an overall emotional trend, and using emoji reactions as a crude proxy to try to understand any underlying trends. The approach is flawed (though not fatally), but the attempt is laudable.
That’s what psychologists call “a joke”. They’re very new, you might not have heard of them before.
Literally nobody even remotely suggested this.
If seeing a month-old post makes you do a long respond where you insult everyone involved with patently false claims, maybe you’re the one who needs a break?