The article actually does explain this in the first few paragraphs.
It is an issue because communities like StackOverflow are actually one of the sources of training material. LLM's are not capable of innovation, they can only do variations based on what is in their training material. People asking questions to other people about things does allow for actual new and fresh answer, where people might come up with solutions other people have not yet.
And yes, you are right, some of these answers would be duplicates and easy to answer. But only to a certain point, there are a lot of answers on StackOverflow that are technically correct but severely outdated by this point. They have been superseeded by more modern ways of doing things or the APIs to do so have changed in newer versions of frameworks.
With a human community you will have people leaving comments on older answers pointing this out and answering with the current answers on new questions.
LLM's, again, are not capable of picking up this new information on their own. You can actually often see this in the answers you get from them, they are often ever so slightly dated already.
When the communities that feed them die they will have less learning material so at the very least they will stagnate.
It is an issue because communities like StackOverflow are actually one of the sources of training material. LLM's are not capable of innovation, they can only do variations based on what is in their training material. People asking questions to other people about things does allow for actual new and fresh answer, where people might come up with solutions other people have not yet.
And yes, you are right, some of these answers would be duplicates and easy to answer. But only to a certain point, there are a lot of answers on StackOverflow that are technically correct but severely outdated by this point. They have been superseeded by more modern ways of doing things or the APIs to do so have changed in newer versions of frameworks.
With a human community you will have people leaving comments on older answers pointing this out and answering with the current answers on new questions. LLM's, again, are not capable of picking up this new information on their own. You can actually often see this in the answers you get from them, they are often ever so slightly dated already.
When the communities that feed them die they will have less learning material so at the very least they will stagnate.