As an EU consumer, I appreciate laws and regulations that ban selling cheap junk that might burn my house down or poison my baby.

I take it you don't?

In my limited experience not all countries do think like this.

It's a cultural thing yeah. Americans genuinely do on the whole think that their approach is better. The good news I guess is that if you're an American and you think "Well I don't" you can (at least for now†) just leave.

† If you lived in the German Democratic Republic (aka "East Germany") in 1950 you could literally just walk to West Germany, by 1961 all other borders are closed and fenced and in Berlin the Wall is up and people who try to escape are being executed routinely. This didn't happen instantly over night, but it took about a decade to go from routine to "Vast majority of people who attempt it are killed".

I mean, in America we have similar regulations. Toys aren't allowed to burn down houses or poison babies. You have to get dietary supplements if you want to poison babies.

Enforcement on individually shipped imports is hard regardless of where you are. Traditionally enforcement is through spot checks of bulk imports, and leaning hard on the importer who has a clear nexus.