Centrism has an important role, but in the United States it cannot be the only driving force in governing. Since the founding, the US has been a pluralist union, and we share this land with all sorts of people, on opposite "poles" of many kinds. We would give any president too much credit if we claim that they created the polarization. People have been polarized, right or wrong, for generations. For some things, where there is widespread consensus and overarching impact on everyone, it makes sense for everyone to compromise and be governed by the majority. But in other things, the minority should not be marginalized, and we have to learn how to coexist. Historically, it seems neither political party has been particularly good about protecting minorities, and that is because of centrism. They finally jump in when the conscience of the majority finally makes it an issue for everyone, and then it finally becomes politically advantageous. Centrism is also a key CAUSE of the political apathy we are mentioning here. When both parties sound, look, and stand for the same thing, having both moved to the center, people quit engaging in politics because a vote for either side is meaningless.
Take high heels, for example. The centrist majority says women wear high heels, men wear flats. I would not hold my breath for this to be overturned any time soon, nor should I embark on a crusade to change this. But I am free to hold the minority practice of a man wearing heels, and I reject any centrist majority's attempts to change my practice.