I’m not sure what gp was talking about. The TouchID sensor also doubles as a physical power button(or a sleep if pressed briefly). It is a physical button too, not like the iPhone ⅞ buttons.
it is part of the OS, not a third party app. So I think that complaining that it is badly designed is fair.
I can complain about the default configuration too if you want. It takes away the function keys I actually need and replaces them with a screen. The lack of tactile feedback is really annoying. Even after configuring the touchbar to display the function keys by default in my IDE, it still bugs me and make me 'mistype' more than ever on this strip.