The author used the touch bar for two years and didn't think of removing the Siri button he accidentally clicked so much, or of adding volume controls to the expanded touch strip.
That's what I want to do: configure something that I used to not have to configure before. The touchbar replaced a row of keys that was fine before and required no extra effort. Once you configure something and it's no longer the default then you have to reconfigure every one you use or you have an inconsistent experience. I'm okay with this for many things but for a keyboard is ridiculous.
On the other hand, a standard feature that's been nearly unchanged for decades (a keyboard), that suddenly is radically different and has to have multiple customization's made by a user who may or may not know that customization's even exist, should not be considered a user friendly product.
It was one complaint out of several, and the default behavior of a UI shouldn't be an annoyance.