Couldn't this be explained by the fact that power switches back and forth? Bush, Clinton, Bush, Obama, Trump, Biden. Wouldn't it be weird to, for example, pass

Couldn't this be explained by the fact that power switches back and forth? Bush, Clinton, Bush, Obama, Trump, Biden. Wouldn't it be weird to, for example, pass single payer national healthcare under D and then repeal it 4-8 years later under R? The fact that our political systems avoid radical swings is a feature. Certainly change happens on a longer timescale, which sounds reasonable to me.