Here is another way to look at your question (which I think some of the posts above have missed.)
First, you are saying you paid for and received [roughly] 60 kWh of battery range, though you understand that they installed a 75 kWh battery [approx.] and then software-limited your car to only allow you to use 60 kWh of that battery because that's what you paid for and that was the deal. So far, I'm on board with you.
But your question pre-supposes that the 0% on your 60 kWh or range corresponds to 0% on the battery if it had not been software-limited. What about the POSSIBILITY that it's the 100% readings that are calibrated to each other? That is, what if 100% on your battery it the true "full" position and it is the bottom of the range -- where you are told you are out of power -- that is actually HIGHER than it would be in a true 60 kWh battery?
The truth, I suspect, is somewhere in between. That is, the software-limited battery is software-limited to the sweet spot middle, rather than tied to either end of the scale. Because allowing the battery to get too low or to spend too much time very low, is bad for the battery as well.