Your points are fine, but I do not see how they apply to the blog post.
Overall, the blog post says, unit tests take a long time to write compared to the value they bring - instead (or also) focus on more valuable automated integration tests / e2e tests because it is much easier than it was 10-20 years ago.
Overall, the blog post says, unit tests take a long time to write compared to the value they bring - instead (or also) focus on more valuable automated integration tests / e2e tests because it is much easier than it was 10-20 years ago.