It is a film festival for cineastes - film lovers or film snobs if you will. Its whole culture. For them there is a big difference between the big-screen cinema experience and watching home video. It is certainly a bigger difference than just the means of distribution.

I think it was David Lynch who said "If you haven't see my movies in a cinema, then you haven't seen my movies".

You may not care for this difference, but why does it anger you so that others do?