This is an illusion created by spending time online. The loudest people are polarized, but the majority of people are still in the middle somewhere, sometimes in a very ambivalent state.

A great example of this is Elon Musk. Online (Twitter, reddit, etc.) people worship him or loathe him. But the average person rarely thinks about him at all and doesn't care that much about him. They certainly don't have a strong opinion.

If you look at research (I read a lot of Pew surveys), this is true for most topics. There are 5-25% of people on the extremes, and everyone else can be said to be "not extreme" about the topic in some way (either ambivalent or just not knowledgeable enough to give a response).