Well, you basically answered yourself: because EU internet laws do not cover shota. But trust me, it will anytime soon and then you will see that content censored moderated too.
On a semi-related note, reddit recently updated their rules to verbally include loli in it (before, it just said "stories, anime" and did not say "someone who appears to be a minor" before, in contrast), now essentially being a mirror of KYM's "Sexually suggestive images of characters or people who appear underaged" rule. Yes, this includes obviously adult yet short characters who happen to wear a school uniform or bikini in non-sexual ways, as usual (and they even have the audacity of making that clarification), all to appease to Tencent, their expected new Chinese overlords, who coincidentially made a huge stock investment on Reddit at around the same time these rules appeared, and Tencent is infamous for enforcing China's censorship laws already.
You know, the same site that is absolutely fine with people posting REAL gore, gruesome real-life events that happened to people and other high-shock content just for people's personal amusement. All because of advertisers and corporations' priorities and laws like the EU laws or China's laws.
This is the future we are headed towards, people. 4Kids, but everyone is in it. I would normally not care that much if I did not know Latin America's stupid "monkey see, monkey do" tendiences to copy everything from the US, as Pelo once put it for Net Neutrality:
And indeed, it happened for anime dubs back in the time: since most of our dubs are re-dubbed from English dubs, we also inherit any censorship from them, like One Piece's lollipop-loving Zanji and literally everything 4Kids did, and it still happens to date, so the effects are permanent now.
What is the point of our side of the world being immune to puritanism and censorship tendiencies if we export them from the West or fucking China anyway..? And that is why it does a little more than annoy me when people look at these happening and say "it's just a small change lol who cares". I am sure people said the same thing about 4Kids at some point, and look how that ended. They keep getting away with this precisely because people keep shrugging it off as a "minor" thing every single time, despite the obvious gradual escalation of it.
So sure, let us enjoy our more positive Internet experience, I guess. EU and China approves.