Voltage drop is a reality but it does nothing to make a grounding path less efficient. The only thing that voltage drop will do is hasten the tripping of a breaker by increasing the amount of current draw to the load. On a fault the low resistance of an equipment grounding conductor will work just as well no matter how far it is pulled.
A thousand feet of #12 copper conductor will have a resistance of 1.9 ohms and at 120 volts in a fault condition will draw 63 amps.
Using the numbers given for a driven rod with earth as the return path as outlined in 250.56 of 25 ohms and I promise this low number will be hard to get the current draw of a fault will be 4.8 amps. The math shows that even at 1000 feet the equipment grounding conductor wins hands down.
I am sure in my heart that you without a doubt excel in your chosen field of plumbing but you display a lack of knowledge of earth grounding and its purpose. What I have said throughout this thread I have backed completely with code sections and math. Unless all those master electricians can do the same I will agree with you that they don’t know diddly.