What ianferrel is saying, that in all the scenarios you could use TouchID on previous phones, you can use your passcode on the iPhone X.
I think it's totally fine actually... I'm sure there are several strange scenarios where FaceID is cumbersome because you can't point your phone straight at your face, but in those scenarios you can always just type your passcode.
That in combination with scenarios where FaceID is more available than TouchID (wet hands, for instance), I think it probably evens out.
You're right, why didn't Apple product designers consider the massive segment of the population attempting to unlock their devices via facial recognition in the midst of a blizzard?
// And they had a demo failure on their new unlock and swipe up for home.