In summary, hermit programmers who only write code for themselves are dead because:

As they don’t plan, you never know when (or if) they are going to finish a task. As they don’t document, their code is not reusable because nobody knows how it works. As they don’t test, chances are the code they write is full of bugs. As they don’t refactor, the software cannot evolve. As they don’t handle infrastructure, their code has only been executed on their machine, and only God knows what will happen when the code runs in production. As they don’t have good communication skills, they do not know how to sell what they do to the market, which is why they are always behind the competence. As they don’t diversify their skills, powerful AI will take over their workplaces.

I think in the end the author took the attributes of "Bad" programmers and applied them to "Hermit" programmers.

So yeah I agree Bad Programmers are going to have a Bad time in future.