After all they're no more entitled to sells then we are to a product we find worth the price.
Of course, who is saying otherwise? That's obvious.
They're not insulting anyone, when it comes down to it as a fan, you either have realistic expectations for a game or you don't and either put Bioware on a pedestal in which they can't "fall" from and can do no wrong or you go in with again, a realistic mindset on what you believe the game is going to achieve.
I remember I thought the game was going to blow my mind away, especially from the trailers and such, I was hyped - so the PR did an excellent job, as usual, but the quality didn't live up to my standards and I looked back and what I thought was going to happen and what didn't and learned from it.
You are right and stating that it's on both ends, but they can do whatever they want with their title and we can only speak with our money. They seem to be in a great position still, as much as I disliked ME3, Bioware seems to be doing perfectly fine and I respect that and I want them to have success, but I'm approaching them from a hesitant state - where as before I would buy their games with no second thought. It is what it is, they can do what they want and we can either buy it or we can choose not to.