One of the problems with modelling culture-bound phenomena as 'objective' rule-based systems is that the latter can become normative. If a mathematical model of typography gained hold, eventually someone would point to your 'unaligned header' preference, and demand you relinquish it because the model proved you were wrong.

This is analogous to that famous Sydney J Harris quote:

The real danger is not that computers will begin to think like men, but that men will begin to think like computers