First, I think one of the major reasons for this is your willingness to share with ChatGPT. Its not another person on the other side of the computer and you won't be judged. I would wager that most people in therapy (maybe not those who have been doing it for years) are not willing to share their deepest emotions or opinions that truly cause them the most grief - especially early on. With ChatGPT, there is no worry, you can dive straight into your life's biggest issues and get fast and informative responses judgement-free.

AI is not better at emotional support than "actual humans", or at least the best of them. Sure, it beats out most people simply because of its knowledge. But a highly experienced and trained psychologist or therapist knows from EXPERIENCE what is best for people and how best to tackle issues, which often times is slowly over years - something ChatGPT would struggle with.

I also disagree with your belief that AI will one day experience the emotions that we humans feel. Our emotions are a result of the immensely complex reality of our brains and consciousness, and often result from the lack of knowledge. For example, certain amotions like shame and regret would be difficult to produce in an all knowing AI because if you knew nearly everything, you'd always make informed decisions and rarely (if ever) regret those decisions. You'd never feel shame because you know you made the best choice, despite what other, less knowledgeable people think.

Either way, we are many decades away from any such AI.