What two factors are supposed to be correlated? I don't think the usage of "red state" and "blue state" is meant to imply that liberalism/conservatism is corre

What two factors are supposed to be correlated? I don't think the usage of "red state" and "blue state" is meant to imply that liberalism/conservatism is correlated with OS choice. They just co-opted a visualization commonly used for political leanings to show mobile OS choice.