Because touch bar is a flop. I never use it because I’m looking at the screen, not the keyboard, and there is no tactile response to the touch bar so you can’t do it by touch.
Touch Bar is not entirely a flop for me. In fact, I have touched the bar far more times in 10 months of ownership of 2016 MBP than I touched the buttons in 5 years of owning the 2011 MBP. I only ever manipulated brightness and volume controls on the 2011 MBP and used the Esc key, obviously. Brightness rarely.
The dynamic controls that change with the app and according to my own preferences increase my productivity manyfold. On the Touch Bar I use app specific controls in apps that support TB and this gives a good boost to my workflow.
Safari
1. New Tab button in Safari means I do not "Apple T" anymore or drag the pointer to + sign in the far right.
2. Add Bookmark means I do not "Apple D" anymore or drag pointer to Share button.
Finder
1. New Folder button means I do not right click and New Folder anymore, or "Apple Shift N" anymore.
2. Add Folder from Selection button means I do not create a new folder and then select files and drag to the folder in Finder, I now simply select and press that one button.
3. Delete button means I do not "Apple Delete" or right click "Move to Trash" anymore, although that gets done a lot habitually since I only started serious customisation last month.
- - - some of the options I have explored.
Transmit 5
Transmit 5 has excellent Touch Bar support that allows me to continue workflow better and seamlessly as well as use the app slightly faster than I could use Transmit 4.
Bear Writer
1. Bear Writer has all the text manipulating options right there on the TB and I do not have to remember them or look for them. I can instead keep typing and hit the touch bar for what option I need when.
These are, again, some of options I have explored and I regularly use a handful of software only even though I explore and know of many. So, TB is NOT a flop for me, not by a long shot.