The keys that the touchbar replaced were definitely not useless - they were media control, sound control, screen/keyboard brightness and expose/mission control/launchpad (and of course, ESC.)
Those are all extremely common keys to use. And yes, you could also use them as "F#" keys I guess. Now, those keys are non tactile and much, MUCH less pleasant to use. Also, if you're watching a movie in the dark and you turn off your keyboard backlight the stupid touchbar stays lit up for 45 seconds.
I think Apple will eventually kill the touchbar or at least offer a version without it.
I think the corner they've painted themselves into is they know they can't charge more for a non touchbar version and if they offer it for less that's cutting profit margin as well as a tacit admission that it isn't a beloved feature.
But their choices over the last few months along with the revelation that they're finally ditching their butterfly keyboards leads me to believe it's coming.