Marketing is only half of it. Yes, having good marketing is important, but ultimately, the success lies on the product itself. You can spend all the money and time you want on marketing a film, but if the film doesn't live up to it's audience's expectations, the marketing won't save it. You see this countless times: a movie gets hyped up for months, which makes the opening weekend big, but then there's a 65% drop the next week because word of mouth got out that the movie sucks.
I understand the industry fine, thank you. You may not like what I'm saying, but that doesn't make my opinions any less valid (heck, you've even argued against points where I was agreeing with you.) I'm not saying that "money isn't a factor" at all. I even said as much in my last post.
What I'm considering you to romanticize about concerning this industry is the idea that film is some pure art form that should (or even can) be free from the politics and financial trappings of a studio.
Yes, that would be WONDERFUL, however it will never happen across the board. Sure, you might get some films here and there where the director calls the shots 100%, but it's a pipe dream to expect that all the time, everywhere. There's just too much money and jobs at stake. And even when the director has full control, that is NOT a guarantee that the movie will be good at all.
Another thing on that topic is the fact that you think the system doesn't work as a whole; that the relationship between artist and financier is always a deal with the devil where the art is sacrificed for the bottom line. First off, this is a situation that is universal across ALL life, and has been going on ever since one caveman paid another cave man to sharpen a rock for a piece of food. ANY time you're dealing with investors where money is at stake, you find that you must respect the limitations that the money line draws. Yes, this can be bad, and there are plenty of examples of that. However, I would argue that there are far MORE examples where the relationship between artist and the money creates a positive one. The demonization of the entire process, without admitting to the positives is what I find ignorant, and the expectation that artists create their masterpiece without the money to be romanticized.
This Spider-Man movie failing will not save anything. It will not revert back to Marvel any time soon, and even if it did, that fact alone is NOT going to magically make an exceptional movie. If anything, the VERY thing your complaining about (studio interference) is even WORSE at Marvel. This movie - by all accounts thus far - seems to be on track with making a quality movie with a cast and crew that respects and understands the character. Why anyone would be against that just so they can see marvel produce yet ANOTHER REBOOT is beyond me.