It doesn't make sense to compare the US to "other countries" that have different political systems. We don't have a parliamentary system. The executive doesn't necessarily represent the majority party in the legislature, which means that the office has a lot of political importance. It doesn't make sense to vote 3rd party when coalitions have such limited power.
This isn't about culture or arrogance. There are solid and well researched reasons that the US and similar political systems tend to be dominated by two parties. You can read more about this here:
> It doesn't make sense to compare the US to "other countries" that have different political systems. We don't have a parliamentary system.
Sure it does, that's how you understand the effect of political systems.
What doesn't make sense is ignoring the differences in the electoral structures and pretending that because something works with a radically different electoral structure in one country, the reason it can't happen in the US must not be because of the US electoral system.
There are tradeoffs to every system. We chose first past the post and our executive structure for historical reasons. It's largely working for us (in a broad historical sense) and we're not going to expend the effort to change it without good reason
This isn't about culture or arrogance. There are solid and well researched reasons that the US and similar political systems tend to be dominated by two parties. You can read more about this here:
https://en.wikipedia.org/wiki/Duverger%27s_law