The Touch Bar isn't going anywhere.
And FaceID isn't that important for a laptop. Any tech-savvy person with focus on security wouldn't want to use it in a corporate or business setting anyway. They would much rather want to use TouchID for security's sake. And Apple probably doesn't want to ship a laptop with FaceID AND TouchID.
A lot of corporations have strict security relating to webcams and stuff like that. Which is why TouchID is considered safer. TouchID can only read fingerprints. TouchID can't record visual stuff on a whiteboard, in a presentation, or see faces in the background (other employees).
Nobody that actually uses their computer for work in such a setting wants FaceID on their laptop, as the cameras often are taped over or covered in some way anyway.