Today we have chatbots. Yesterday we had search engines and stack overflow. Before that we had books. And before that? Well what do you know... software programming is a relatively novel field. It's almost as if nobody has perfected how it should be learned.
The most valuable knowledge comes from experience. I copied plenty of code around during my learning days as well, and I still do it today. The most important part however is trying to understand the code you're working with. If you can understand it, know when it fails, test it in the right way, etc., then sure, you could probably learn to code from chatbots. They provide the information, and you're at liberty to do what you want with it. If you just copy it and forget, you'll be a bad programmer. But it's not like you couldn't do that before either with the other sources that were available - there were plenty of bad programmers before we had these tools available too.
That said, there is a risk that these chatbots do not provide any useful context around the code that they produce. When you learned from a book or stack overflow, you were reading from a reasonably authoritative source that could explain the code that was produced. But the authority behind the code from chatbots is probably much weaker than what we have from stack overflow, which in turn was probably also weaker than what we have from books. Does it have an effect or learning? I have no clue. But I still think you can learn from chatbots if you use the output that they provide in the right way. (Disclaimer: I have never used one of them and have no experience with them.)