Everything you could want to know about US duopoly politics can be found in the fact that nearly every presidential election ends up very close to the highly improbable perfect state of 50/50 red/blue. 

It is obviously not a fact that exactly half the country feels exactly one way about everything and the other half feels the opposite way about all the same things.

The better explanation is that each duopoly party is constantly mutating itself to appeal to the most people it can. And they are both equally good at this zero-sum, solved game: so they *basically* tie every time. 
(The more cynical reading is that they are a uniparty and the one thing both sides can't stand more than the other side winning is a non-uniparty option winning). 

If two equally-competent computer programs played a simple game like tic-tac-toe, they would tie every time. 
If the game was more complicated (or the difference in competence between the programs was wider), they would tie less often. 

So: how simple is the game of "convince Americans to vote for your team"...? How similar are the teams...? 

 Idk, but Biden is now wearing Trump2024 hats... So whatever that means. 🤷‍♂️ 

 It’s all so fake and gay 

 Yes. So fake.  What is this called? False legitimacy?  It's like designing a form... Once that thing is printed and sitting on a clipboard, people will line up to fill that thing out, COMPLETELY, never realizing that they're being manipulated into someone's ecosystem...