I think activism is sometimes a little overkill.. It promotes, impedes on people's everyday rights.
I actually agree with your statement.  what does it really accomplish?
It can accomplish things if done correctly I believe.. One form of activism is Art (artivism) which is much less harmful!
True.  I can see how art would be a viable option.  What about activism in movies?
Movies are a great way to sneakily slide in some activism for others to see! With some of them in roles as public officials, there's just so many ways for the word to spread.