I never get arguments like this. In a perfect market every entity tries to get as much money as the market is willing to pay. There are some pretty extreme example such as this one, but in the whole that is a good thing!
But what is a perfect market? What if misleading the consumers brings in the most money? If it was possible to somehow find out and compare the environmental impact of manufacturing things we can buy, I'm sure our decisions of what to buy would be very different. Similarly, if the movie posters had the actor/millions printed on them, then the "market" would be better informed to say enough is enough. Maybe.
> In a perfect market every entity tries to get as much money as the market is willing to pay.
Where did you ever see such a thing as a perfect market entity? In the wonderful magical Hollywood kingdom where you can't watch the DVD you bought in Europe back in the US, certainly not.