For the same reason the carbon footprint of every Elon rocket launch is being attributed to SpaceX even though some other entity "paid out of their ass" for many of them.
Because it takes two to tango. In both cases "all the credit" or "all the debit" goes to the manufacturer for making the product AND the customer for paying for it.
Because it takes two to tango. In both cases "all the credit" or "all the debit" goes to the manufacturer for making the product AND the customer for paying for it.