A lot of people have the misconception that the EU cookie law applies to all cookies, but as the blog post correctly points out, that just isn't the case.
Also, it only applies in the EU. You don't need to display any banners outside the EU. Not that I am pro-privacy invasion, I'm not, but I'm definitely anti-annoying-popups.
Edit: https://gdpr-info.eu/art-3-gdpr/ ("where Member State law applies" and "subjects who are in the Union" [...] "regardless of whether the processing takes place in the Union or not" respectively)
Edit 2: https://gdpr.eu/companies-outside-of-europe/ for more info: "The whole point of the GDPR is to protect data belonging to EU citizens and residents. The law, therefore, applies to organizations that handle such data whether they are EU-based organizations or not, known as “extra-territorial effect.”"