you are clearly not an artist. production, no matter the media, takes time. and lots of it to be good. a good movie isnt filmed in an afternoon. a good painting or sculpture has a handful of iterations, each costing money in time and materials. with good art you are also paying for practice. your favorite band did not wake up one day and produce a hit album. they spent years practicing and writing songs.
my favorite explanation for why things cost they way they do comes from the carpenter who fixed the sqeaky floor that the homeowner couldnt, no matter how hard he tried:
cost of nail: $.10
knowing where to place the nail: $59.90
total due: $60.00
production takes time and money. the internet is not the only medium for art. if it really is one in the first place.
i cant stand how ignorant people are when they try to justify getting something for nothing. you probably expect to get paid for flipping burgers, show some respect and pay someone who creates a work of art you enjoy, no matter how 'easy' and 'free' it is to reproduce.
finally, the relevant clause for your review:
"To promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries; "