Multiple EU airports like Schiphol already do facial scanning+passport for automated entry for citizens of select countries; so does CBP on US entry from abroad. What's the issue, that it's a subcontractor?
For me, mostly yes. I simply don't trust companies enough to be OK with this level of data collection and intrusion.
If it were a government-run operation, I'd be less resistant to it. I'd still bristle about it, but I'd probably accept it.