I appreciate your responses, and I am seeing further into this issue than I did before.

After maore thinking based on what you guys are saying: There are millions of single family dwellings, multi-family dwellings, commercial buildings, and industrial facilities that have been operating for decades without a Ufer grounding electrode and they have not had any safety related incidences because of the lack of the Ufer ground. So in reality and for safety it is pretty much optional whether to tie it in or not?

So does it really need to be mandatory considering the realities and logistics of the construction site?