Though you see that your culture is not everyone's, not acceptable within your culture is not equivalent to not acceptable full stop.
Not everyone agrees with your permissions rule distinctions between instructional works and literary works, but this does not mean that what they are doing is not ok.
Being criticized is not the same as not being allowed to express yourself.
P.S.: Characterizing all possible arguments against your position as soon to be replaced trendiness disqualifies anyone from having a discussion on this subject with you, and pre-insults anyone who would want to.