You're coming at this as someone who is insanely privileged.
Here's a very easy answer for you as to why people care:
The policies of candidates kill people. Their views kill people. Their direct actions kill people. People that are not as privileged as you will die because of the actions of people voted into office. "Not caring" about that isn't an option to those people.
I think most of what I’m speaking about is federal stuff.
I’m also coming at this from someone with anxiety and honestly dont need more stresses in my life and I’d argue that politics has a very negative effect on mental health and we need to weigh the equivalent exchange of what we gain and lose in that exchange.