Isn't this the same in almost any industry? For example, in engineering this kind of "reinventing the wheel ad infinitum" you are describing is incredibly common. How many times to you think engineers have separately designed and tested clips to hold capacitors in place in the ECU of a motor? Many thousands of times, while being paid competitive salaries. Maybe you should argue there should be some "book of capacitor clip designs" but actually this doesn't work in practise because every capacitor clip design needs to fulfil very slightly different requirements. Often it is just easier and faster to redesign from scratch.

Taking existing components and redesigning them in some small way to fit your specific requirements is common in almost every industry I can think of.