This is just my speculation, so take it as you will. The EU has been pushing for digital ID cards for quite a while, and this is just another attempt. The last serious attempt was the Covid vaccination passport, but so many people still opted for paper certs, and the rest deleted the app when vaccination was no longer mandatory, that it failed again. So, now the authorities are becoming smart and trying to go through the vector that has a proven record of driving technological change: porn.