"I don't know why people say a double-edged sword is bad. It's a sword. With two edges." -Kamahl, pit fighter
A piece of fine art is more than just a pretty thing to look at. Some artists' works become pieces of history. When people start forging a piece of history it is pretty bad. At it's most innocent a forger creates and sells a copy of an already existing piece of work. At it's worst, the forger creates a new work by forging the style of a respected dead artist and sells it as one of that artists newly discovered pieces. In the latter case you are altering historical records. If you don't find fault in that then there is nothing more to talk about, but I and many other people view such actions as particularly heinous. It should also be noted that there is a difference between a forgery and a reproduction of a piece of art. A good and ethical artist can make good money producing reproductions.
cut short when it has plenty of life in it
That phrase, I believe, illustrates my point. People view these shows in terms of how long people could be interested and not as a story with a beginning, middle, and end. Sure, some shows are meant to be "monster of the week" episodic content. It just frustrates me that people find it unacceptable for a show with great ratings to write an end and move on to new projects.
In some ways it exceeds it, because it has managed to sustain itself with many more episodes
I really hate this idea. If there is a story to tell, then it should get told. Keeping a show going for so long is a purely profit driven paradigm. Two good examples. "Heroes" should have ended and the end of the first season. Instead they refused to really resolve anything so they could keep the same thing going for more seasons. "Lost" completely jumped the shark and played out more like Ad-Libs: TV Drama Edition the last time I watched it(which was quite a while ago). "The Office"(USA) did copy a good deal from the original series, but then decided to go in a different direction. It is now more like a sketch comedy/improv show than a real story driven series. I still watch it because I happen to like sketch comedy/improv, but the story and characters are getting a bit absurd. One funny thing is that "The Office"(UK) actually involved the fact that the cameras were filming a show, but the fact that the cameras in "The Office"(USA) have been there so long without any story involvement is almost comical.