We're not talking about legal obligations in its home country though. I can buy Jack Daniels at age 19 in my country from their local subsidiary, and no-one thinks that this should be a crime for their US parent company because the US drinking age is higher. (Of course it would be a crime for either the parent or the subsidiary to sell to 19 year olds in the US)
(No-one is blaming Dell or Let's Encrypt here, to be clear, it's the US' excessive extraterritorial laws that are the problem)