"Both sides" is just a shorthand expression for principles otherwise better understandable as "due process", but this is hard to summarize in just some words or a couple sentences.

It basically means there are two sides (at least) to everything, that can't just be disregarded. Exceptions prove the rule, of course.

On another point, Hotelling's law is a really poor example when it comes to debates or questions of politics, in my opinion.