And this is why the abundance mindset is not used in isolation.
Part of Covey's argument was to seek alternatives.
The Abundance Mindset does not mean, "For every resource, there is sufficient amount to be had by everyone." It means, "I will not hoard, because having less than someone else does not mean I do not have enough."
It does not mean, "There's more out there!" It means, "Whatever there is, it can be distributed to everyone."
For instance, I might say, "I'll consume less oil so that you can have some, too, because I think you need it more than I do."
So yes, you are taking it too literally.