It’s always been possible to get refunds from Amazon without contacting a human, through a very simple form. I haven’t used their chatbot, but I’m curious how it’s better than the old form.
Some forms were replaced with bots. For me is the "Request invoice from vendor". I used to have a canned email I would copy paste into their contact form but now I have to answer a few questions the bot does so it is three or four copy/pastes instead of one. Just an annoyance but still, not progress.
This is my experience as well. Almost anything that the chatbots do competently shouldn't require more than a form on their site with a few questions and often did in the past.