The original problem in the US was that it was an airport specific card. So you would need a plane full of ID cards or mandatory handling ( that is no unescorted access airside).
The impact, translated in to a European context, would be places like LFAT and Lydd would need to introduce handling for all visiting aircraft. In addition, this is a specific TSA vetting process and ID card.
Carrying ID in and of itself is not unreasonable. It is possibly even necessary to security vet all pilots, but to go through this whole overhead and only have it apply to one airport is totally disproportionate to the risk.