Totally agree; I had to cut a few sentences about that :). (I also tried to steel-man the paper as much as possible).

Oddly enough, it seems like, although the value of "blind operation" is well-understood, it's not super well researched. As one of the papers I cite puts it:

> Little research deals with the optimal design of haptic features and how haptic feedback can support the user in searching for control elements.

https://pmc.ncbi.nlm.nih.gov/articles/PMC6676796/