As you astutely note, the company probably has it's "HQ" (for some legal definition of HQ) a mere 30 minutes across Dublin (Luas, walk in rain, bus, more rain) from the Data Protection Commission. It's very likely that whatever big tech data-hoarder you choose has a presence very close to their opposite number in both of these cases.

If it was easier or more cost-effective for these companies not to have a foot in the EU they wouldn't bother, but they do.