Cousland is partially correct. I theorize the main reason Bioware actually responds to Reddit is because there, you have things like upvoting, downvoting and hiveminds. If your opinion isn't the most popular one, it gets downvoted. So, if a room full of Bioware brown-nosers (and Bioware employees themselves) don't want actual critique, all they gotta do is post there, and any criticism or backlash they get from DLC they make or the games they produce will be severely diluted. If there's one thing I've learned about Bioware after all these years it's that they take criticism so outrageously personally. I'm talking, like you insulted their mother personally. Here, as long as you don't break the ToS, you can post critique all you want until the cows come home. But at Reddit, you get banned for simply having a contrary opinion.
In short, Bioware doesn't want to hear actual criticism. Oh they may think they do. They may poke fun at things like them bungling up the Mako controls in Mass Effect 1 or something like that, but when you get down to it, they'd much rather have you sit around and constantly tell them how great and progressive their games are. Which sounds all nice and peaceful, but doesn't accomplish much in the long run. The first step to progress is realizing something is wrong or needs fixing. Nothing was ever accomplished by sitting back and saying "Yep. Everything is perfect the way it is."