Filmmakers shouldn't care about ticket sales? Mogul, perhaps you and I aren't talking about the same thing. I'm talking about working Diretors, not amateurs like us (I'll assume neither of us are Directing blockbusters, yet!).
Anybody can buy a DSLR and make a 'movie' and post it here, only concerned with the narrative. But selling tickets is what makes a professional, a professional. Yes, yes, yes, story IS important, but it's really a small part of the business of Directing.
All the working Directors I've known follow the business very closely. They know all about the latest films, and how they opened, and on how many screens; who wrote what script; what scripts sold, and what didn't. They study the current trends, and adapt them into their style. Choices like 3D, IMAX, wide aspect, direct-to-video, and internet-only releases all have a huge impact on how a Director frames his shots, stages his actors and edits the sequences. So, if there's a tectonic shift in how movies are viewed in America, it matters. To live in a creative vacuum and ignore the market is a little reckless for a professional filmmaker.
Selling tickets is essentially the name of the game, and the working Director is well aware that this is their job. That's the simple difference between us and them.
_Rok_