It it a lost cause to have privacy at international airport. The only thing we may wish is that this data will stay at the airport and it won't be accessible to the companies not related to airport security.
Fat chance, but hope your expectations pan out instead of the opposite factor of distributing that data for $$$$$$$$
Outright selling biometrics is certainly more risky than regular PII, because of biometric laws. However we never know if Google/Alphabet won't establish subsidiary to "help" with data processing and stuff.
