They do that because they think people like games that are dumb are loud so they make games that aren't either look like both so that they sell. Since ME3 is the third game, people who know it's not dumb or loud will buy it anyway since they're already invested in the previous two games so they're focused on the (possibly imaginary) demographic of drooling CoD fans, which they imagine to be very large and have a great love of manly men who shoot manly guns. And it's the job of the marketing department to sell it to people who might not buy it otherwise, as opposed to people who will buy it anyway. And it's not like this is an isolated thing that can only happen on a EA-published game [http://www.cracked.com/article_15876_5-ways-hollywood-tricks-you-into-seeing-bad-movies.html].
ME3 is doing not if not trying to please everyone. They have an ACTION mode for people who find choosing from a dialogue wheel to be too taxing on their minds and a story mode that I was sorry to learn is just super easy difficulty, as opposed to a mode in which action sequences are replaced by a block of text that reads AND THEN SHEPARD WENT DOWN AND SHOT THE ALIEANS. I'm not making fun of the concept, that mode is what I actually want because I still don't know who let those boring shooty bits in my game about interstellar diplomacy/boning.
And yeah, I for one saw plenty of rage over the day one DLC and similar stuff. I'm especially amused by the rage following the Protean character, since people assume it went like this:
Marketing exec: FOOLISH WRITER, WHAT IS THE MOST INTERESTING PART ABOUT YOUR PUNY GAME?
Writer: P-please don't hurt me, sir! We have a Protean character, he's very cool!
Marketing exec: YES, MY EVIL FOCUS TESTING TELLS ME SUCH A CHARACTER IS PROFITABLE. I COMMAND YOU TO REMOVE HIM FROM THE GAME SO WE MAY SELL HIM ON LAUNCH DAY, SEPARATELY.
Writer: Please, sir, don't! That character is essential to the story!
Marketing exec: THAT WILL MEAN PEOPLE WILL NEED TO BUY THAT CONTENT TO PLAY THE GAME PROPERLY, WHICH IN TURN MEANS WE WILL ESSENTIALLY BE ABLE TO CHARGE MORE! SUCH A MOVE IS CERTAIN TO MAKE OUR DARK MASTERS MORE MONEY! NOW BEGONE, BEFORE I DEVOUR YOUR SOUL!
...When it probably went like this:
Marketing exec: We want a day one DLC. Is there something interesting you can use in it?
Writer: Uh, there's a Protean. They are supposed to be dead for millenia. But it's just a character that shows up briefly.
Marketing exec: Dead for millenia, eh? I think the fans will go crazy for it. Give the DLC team all you have on him and tell them to make him a full fledged party member.
Writer: OK. See you at home then, dear.
Marketing exec: Bye, love you.
(SURPRISE TWIST!)