I think it's so little acceptance that people have different experiences with their devices. The person who loves FaceID and has a failure rate of once per month might have a different experience than the person who uses their device in different ways and they struggle with FaceID in ways TouchID never did. It's not the same for every individual.
Perhaps... but calling it out as "unreliable junk" and "a gimmick" seems over the top. He's free to believe that from his personal experience (IF that's even true), but to label it so for everyone is nothing more than simple trolling.