We are supposed to forget everything we just seen? (Spoiler)
95% of the movie we seen Hollywood as bunch of amateurs, indifferent to human life, taking drugs, drunks, racist, sexually harassing, nihilists who spending time at lewd parties, ungrateful to their actors, arrogant, haughty and even as psychopaths ... and despite all that, in the last scenes the director trying to convince us how magical and greater than life Hollywood is and all this from Manny Torres POV who seen the dark side of Hollywood and suffer from this industry. It's not convincing.
One element of Hollywood magic he illustrated very well, it's the moment great actors getting into character not matter their psychological or physical condition at that moment (for example, drunk, anxious).