If you literally look up the most upvoted HN article about FLoC [1], it specifies two main issues with FLoC in BOLD: Fingerprinting and Cross-context exposure. Which if I understand correctly the Topics API fixes. But the article implies that these are minor problems that we never really cared that much about.
Whether it is this or constant aggressive writing, it seems that the goal of this blog post is to simply inspire anger and hate, while not furthering the discussion on the topic. Which makes this article unhelpful (if not damaging) to the goal of personal data privacy.
[1] https://news.ycombinator.com/item?id=26344013 [2] https://www.eff.org/deeplinks/2021/03/googles-floc-terrible-...