I'm not sure what your point is. Courts generally follow precedent, not your opinion about what is or isn't logical. Do you want me to explain to you the nature of extraterritorial jurisdiction, extradition treaties, etc., distinguishing your hypothetical from this case? I don't have a dog in this fight. If you really want to understand what's going on I would suggest you simply look up the complaint this AG filed, which will give the basis for jurisdiction, which the court evidently accepted.
There's also more than ample legal precedent that only the US federal government has the authority to regulate inter-state commerce, which is clearly what .COM is as an entity run by VeriSign, and internet traffic/telecommunications traffic that crosses state borders. There's such a vast body of law in telecom law that the federal government regulates long distance telecommunications traffic that I could paste citations to dozens of court cases going back 75 years. International internet traffic from an entity whose servers aren't in Texas isn't subject to Texas jurisdiction.