Nope. Nobody changed the argument. No one said "USA subsidizes drug development out of a societal sense of charitable obligation to the rest of the world." It just so happens that - due to the unfortunate design of our system - the rest of the world is receiving a subsidy.

In fact, there are European-HQ'd pharma companies that also make the lion's share of their profits in the US - so that's certainly not benefiting the US.