The simulated conversation image is a great example. After seeing those responses, the response 'aww so cute' or 'Love the daisy' are about about the same or better than what I can or would care to think of in a text conversation. Is there really a better way to think answer that and why should I waste the time to do so?
Do people on chat with their nearest and dearest? Or do they chat with a mix of people who they may like or even dislike.
It also depends on the discussion. Whenever someone talks to me about something requiring my personal attention, I pay that attention. But most conversations with people are trivial, and expecting someone to drop everything they were concentrating on and pay full attention to your trivial question is, again, a sign of disrespect.
This effect is the only one thing that worries me with those replies. It won't be good if people start to choose only from suggestions instead of choosing them only when they are appropriate. And, as you observed, the effect can be subtle.
But the very idea of a computer typing up the response for you? I don't mind that at all - that's what computers are for, to let you do more with less effort.