Yeah and the negligible added convience to unlock your phone without touching it. I guess that justifies it to many.
I've only ever had android phones, mostly the google-brand because they were cheap and no-frills android. It has always struck me as bizarre that people would use their face to unlock their device. I know it's gotten better but that seems way easier to spoof than even fingerprints. I've seen several episodes on TV where this has literally happened so it's not even an unknown fear.