You're cherry-picking the most interesting election of the last five years. The recent primary was ~38% turnout.

https://www.seattletimes.com/seattle-news/politics/which-wa-...

Ok, so WA had 38% turnout for a primary so what? The whole point is that you need to compare it to other states to make any sense of the data.

Arkansas had <26% (457,856 votes / 1,762,024 registered voters) [1].

38% is looking pretty good.

[1]: https://results.enr.clarityelections.com/AR/112731/web.28556...

> The whole point is that you need to compare it to other states to make any sense of the data

I disagree with your assertion. Even so, alistairSH's conclusion: "We'd do well as a country to allow nationwide mail-in voting." like it was solution to solving lack of voting from renters, when cherry-picking data gets us 12 points at best. It might be part of a solution, but it's demonstrably not a majority difference.

All this presumes every possible vote is equally valid.