What are the themes of The Great Gatsby?

Myrtle Wilson's death is one of the main themes of the Great Gatsby

Question: What are the themes of The Great Gatsby?
Position‹4 of 5›: The Great Gatsby is about death
Argument‹2 of 2: Myrtle Wilson's death is one of the main themes of the Great Gatsby

The death of Myrtle Wilson triggered other tragic events.

The argument

Myrtle Wilson's death acts as a trigger, changing the direction of the novel. The hit and run creates tension and blame between characters. Daisy was the person who hit Myrtle, but she was driving Gatsby's car. He took responsibility and claimed to be driving the car in order to protect her. Tom, despite knowing the truth, leads Myrtle's angry husband, George, straight to Gatsby to carry out revenge. Because Myrtle died, Gatsby died too.

Premises

[P1]Myrtle Wilson's death in a hit-and-run is the trigger that changes the novel's direction, creating tension and blame. [P2] Daisy killed Myrtle while driving Gatsby's car, and Gatsby took the blame to protect her. [P3] Tom then directs the grieving George to Gatsby for revenge, so Myrtle's death directly causes Gatsby's. [C] Therefore, because Myrtle Wilson's death drives the fatal chain of events, The Great Gatsby is about death.

Counter-arguments

Even if Myrtle Wilson didn't die, another tragic event would have happened in its place. There was already tension between the characters, starting in New York City when Tom Buchanan and Jay Gatsby fight over who Daisy loves more. The characters were already having issues between them and would have most likely split up regardless.

Rejecting the premises

[Rejecting P1] A plot mechanism is not a theme: the premise identifies what moves the story rather than what the novel is about, which is the question at issue. [Rejecting P2] The detail supports a different reading. What the episode shows is Daisy protected by wealth and Gatsby willing to be ruined for her, which belongs to the class and American-dream positions in this debate rather than to death. [Rejecting P3] That one death causes another establishes a chain of events, not that mortality is the novel's subject; on the counter's account the collision between these characters was already set and would have found another form.