For those unaware, TV and film unions in Los Angeles are incredibly powerful. As a result, people who work in TV and film jobs are paid far above median wages in Los Angeles. Also, I doubt that overseas staff working on TV and film sets are paid the same level as Los Angeles. If anything, LA studios are repeating the same story that we saw in the 1990s and 2000s with US manufacturing: Move it somewhere else where wages are very low, e.g., China or Mexico.
Also, I see this anti-union sentiment a lot on HackerNews: Whenever unions strike, there is near universal rejection as a strategy. The anti-union sentiment on HN is tiring, especially from the US and UK. Those big strikes in Los Angeles resulted in large pay increases and/or expansion of territory (better payouts for streaming, etc.) for those union members. In short, it worked.