It doesn't matter that the companies are over-hyping things (the numbers and overall situation)...
We still live in a monetary system, and their primary concern are profits.
Not that it would matter either way... because those who pirated the songs and everything else probably would never waste their time on 'buying' it even if pirating wasn't an option.
Besides, as it was already mentioned, studios and artists still rake in millions... but it doesn't matter.
They operate within the monetary system, and in such a system, greed is promoted and applauded (even though its nothing more than learned behavior that twists peoples perceptions and values).