I've never heard of any of those, so maybe it is true?
Some of them are more recent, but even the most recent movie (the Chavez one) is over a decade ago, got panned by critics and looks to be a relatively low budget film. The sort of thing people into pop culture are likely to not know about.
I think the fact you can't find anything this decade is pretty telling
I also admitted the topic hasn't been popular of late. Your comment didn't say anything about recency. It's likely that the dwindling percentage of Americans in unions has something to do with fewer recent depictions of labor struggles in TV and movies.