All this information in your post made me curious, so I decided to give both DeepSeek and ChatGPT a go.
When I tried to use DeepSeek from my laptop, it asked me to sign in first.
I didn't want to, so I gave it up there.
ChatGPT didn't ask me to sign in, and offered me the option to try it for free.
So I typed the term "marketing myopia", and it gave back something like a post containing a few paragraphs about "marketing myopia".
Having used Google search for many years, like most of us, I have become familiar with snippets where you can see the source of information.
ChatGPT doesn't seem to provide the sources where it got the information from.
How do we know that these sources were credible and trustworthy, or not?
In my eyes, these AI tools seem to have many things in common with applications like Google Translate or Grammarly, which are very useful but have their own limitations.
In fact, they are more advanced than Grammarly, but they follow the same pattern.
They take one sentence or phrase from one website, one from a second website, another from a third website, and so on, and through this sophisticated "copy-paste" method, they produce an answer in the form of an article.
Another issue is which websites they rank themselves as credible sources, because they don't say.
Actually, I think that, in case of my query, the answer provided by ChatGPT was heavily based on LinkedIn articles.
So, is LinkedIn the only source of knowledge in the world?
Sorry for the long answer, but these are my genuine thoughts.