When I applied for my 2-year license in Sept. 2019 at Mueang Surin DLT, they required my US Passport, my valid US State drivers license, an IDP, a medical certificate (30 baht) and Yellowbook.
In Sept 2021, when I renewed to a 5-year license, the required documents were my expired 2-year license, my passport, a medical certificate (still 30 baht) and 2 forms of residence verification. The choices on the application list were 2 of the following: a Yellow book, a resident certificate from immigration and Pink ID. I chose getting the Pink ID card (that was free) over paying the thieves at IM, 500 baht for a fast track RC.
Just because you haven't found a Pink ID beneficial to you, telling me "You didn't need it" shows me just how little you actually do know about the benefits of a Pink ID card to others.