Because the Oscars are rubbish. The Oscars do a filmgoer's thinking for him. The Oscars tell people what they should like or dislike. People actually believe that a "best picture" is deserving of that title. Meaning, all the other films produced that film are not the best picture; that they're somehow inferior because they were not validated by the politically-charged, easily-swayed nominating committee. The Oscars are not an arbiter of taste and art and craftsmanship; they are an arbiter of commerce. That's what they've become. Every year, the studios send out the films they wants as notches on their belts. Once nominated, the studios wine and dine the voters shamelessly. Nobody's supposed to know about it. It's not supposed to happen. Yet it does.
And anyway, since when are the Oscars about movies anyway? After Oscar night, all I hear about is what some crap starlet wore on the red carpet. Nobody's talking about movies; they're talking about gowns. It's such a joke. So, to utterly fly in the face of your logic, I absolutely love movies and want nothing to do with the Oscars--because they stand for the exact opposite of "love for movies."
The Oscar (the actual award, that is, not the ceremony on that one night, which of course is more about star gazing and glamour), is very much about movies. A review of the Oscar archives tells us much about what we valued as a culture in a given era, what was taken for art vs commerce, how the two blended together and IF the two blended together in what is a pop culture art form to begin with.
Today, movie lovers ought to treasure the idea of the Oscars more than ever. Look at the list of Best Picture Oscar nominees for virtually any year pre-1990 or so and you'll see a list of mostly adult, relatively intelligent, largely screenplay and/or acting dependent product, many of which ALSO landed on the top box-office draws of their year. But you cannot count on those kinds of movies, the small, non-CGI spectacular, landing on any list of top box-office draws today. No, today, just about the only reason a studio or a producer puts so much as a dime into a small, intelligent, screenplay and/or acting dependent movie rather than the next comic book/kiddie/gross out comedy franchise is in the hope of possibly being associated with an Oscar nominee. For the sake of, oh, let's say bragging rights or personal legacy.
Anyone who looks forward to the next Woody Allen movie, probably the next Martin Scorsese movie (unless he too is now on the huge, CGI-laden, 3D spectacular track from now on..), the next Cohen Bros. movie, the next small movie from a passionate writer and director no one has yet heard of with an actor or two in it we'd all thought couldn't or wouldn't do anything on a budget too small to support a horde of dinosaurs or space aliens, thank the Oscars for that, because it is very likely those filmmakers' careers (and, yes, I am including Allen and Scorsese here, too) would have been OVER decades ago had it not been for studios and producers willing to set aside some money for the sake of a potential Oscar nomination rather than capturing the "top box-office" spot on opening weekend.