Because it adds 0 accuracy to the model.
We didn't include 10 ms of lag into our calculations either.
I could choose to continue to add variables and disrupt the conversation to ensure nothing gets accomplished, but I would only choose to do so if I was intentionally disrupting a thread to make these insignificant contributions somehow seem important.
In a discussion that is making progress, running around in 6 directions at once is a diversion.
If you believe DR is important, redo the calculations and contribute something to this thread.
To date, you argue about how DR is important in some imaginary situation without applying it to the metrics we have agreed on - Toughness Value. This is disruptive and a waste of our time.