Yuuuup. About half of voters don't even understand how marginal income tax rates work, that is how little they know what's going on and how anything at all works in the mysterious and confusing world around them, and a lot more are barely better off than that. Worrying about gerrymandering et c. is nerd shit, most people don't know a thing about it. They're more likely to, literally, vote on whether general vibes are currently good or bad than to give any fucks about specific policies like that.
/* TV is like twitter: in order to preserve one's sanity, it's best to never use it, except for highly technical things like weather forecast or watching sports live. Despite that, it's the pastime of hundreds of millions. */
I agree. They definitely don't come up (or campaign finance reform). I wouldn't suggest a candidate run on those issues (a better platform would be anti-chaos), but responsible politicians might be able to enact them once elected.
Open a news website. Several news websites. Turn on the TV. Talk to some people about politics. How often do those topics come up?