> but the truth of the matter is that without copyright laws, there would be a significant decline in the production of movies, music, games, and many other costly mediums
It might seem very intuitive to say such things, but it is not truth. The truth is that the economic evidence is just not there. What do Landes & Posner say?
"Economic analysis has come up short of providing either theoretical or empirical grounds for assessing the overall effect of intellectual property law on economic welfare." -- 'The economic structure of intellectual property law'; Landes, Posner; 2003. Conclusion, p422, s3.
That means we do not know whether it does good overall. Hard to quite believe? Well there it is.