Earlier quoted context omitted.
No, WhatsApp does not bring the same features. WhatsApp is very different. You can react to messages in iMessage, which is just one among other features WhatsApp doesn’t have.
You're saying some people exclude others from their friends group because of fucking smiley faces on a message? God that would be stupid if true.
This isn’t stupid. It’s the natural consequences of tech that doesn’t conform to real human behaviors and social norms.