I have read the article and I found it very thin on the details regarding any specifics on what exactly "tariffing big tech" would be, especially that StarLink mentioned in the article is not really "big tech" in EU, but more of a niche ISP.
Which is why I believe he didn't read it, plus the general trend of HN users to rush to comment without reading the articles that's a meme at this point, which only results in low quality emotionally charged rants being upvoted to the top even though they have little to do with the article in the topic.
And the actual big-tech would be more difficult to tariff since their products don't cross any customs like star link, but are all sold by companies registered in the EU, same how example Fords are also manufactured in the EU to get around tariffs.