That's like saying American law doesn't apply to Russian citizens in Russia when it clearly does.
The court may struggle to apply it's judgements, especially if there isn't an applicable extradition situation, but all it takes is one representitive of the company to go to Europe and they are open to things like arrest for not following the judgement of the court
Only if you have no people or capital in the EU. If you were a small business that sounds correct, but every medium to large business I have worked at has had at least something important going on in europe (clients, suppliers, offices, etc).
Almost certainly false in practice. It would be shady bordering on illegal to detain a mere employee of a GDPR violator. Unless you are a famous employee of a big company that was egregiously flouting the GDPR but also had no other ties to the EU, then maybe you’d rethink your holiday plans.
The court may struggle to apply it's judgements, especially if there isn't an applicable extradition situation, but all it takes is one representitive of the company to go to Europe and they are open to things like arrest for not following the judgement of the court