I can't speak the the intent of the union in the article but after all of those things you listed you might want to know that your colleagues are getting treated fairly as well. For example, how would you feel about all your benefits if you learned there were contractors that did your same job that didn't have access to the same benefits that you have and haven't been given an avenue to earn those benefits? (https://www.latimes.com/business/technology/story/2019-11-08...)
Or, how would your feel if the product you worked on was being produced with slave labor? (https://www.washingtonpost.com/technology/2020/12/29/lens-te...) Would it be enough to just say, "I'm not ok with that, I'll work somewhere else." or do you think you should have some say about how your work is used?