That is not to say that there is no such thing as a bad film. Films can be technically flawed or have a brain dead plot. But on another level, films can also be bad because they promote a set of beliefs or values that we may find objectionable. But that judgement depends on the individual. Some of this change in American film is for the worse but much more is for the better.
Movies are now and always have been censored.
The question who would we prefer to do the censoring. Our choices are the market, the Government, or the Industry itself. As it stands, there are elements of all three in the censorship of movies.