Because the main thing that matters and determines if a film is good or bad...is the box office?
"Successful or unsuccessful." You can call anything you like "good" or "bad."
There aren't enough determined complainers to matter, as has already been demonstrated. The number of fans who are angry enough to stay away is miniscule, a drop in the bucket.
And most of them amble in to complain a week or two after the premiere, insisting that they somehow "saw the movie for free so Abrams and Paramount don't get any of my money," which is pretty much bullshit. So, again, who cares?