There is a difference between knowing and believing.But you don't believe them, right? You said you're a nonbeliever in everything. So you follow them, but don't believe in them per se. That's what makes you a nonbeliever in everything. You can claim that you only "follow" certain laws and rules about things that seem to work, but you don't accept that they are real, you reserve judgement as to their alleged reality. That's the kind of fence sitting that allows you to say that you don't believe in the flat earth, but you also don't necessarily believe in a round earth.
For us to better understand each other I think we should clarify our definitions.
As Fabric pointed out from the dictionary.
A belief being "existence of something not immediately susceptible to rigorous proof"
If a law is not immutable or can change. It becomes a rule.
My first rule is. There is an exception to every rule.
Imagine following a law and the law changes on you, that could hurt.
I do accept laws as reality. A law is known, repeatable and does not change.
Rules can be changed, twisted, broken and sometimes tip-toed around. A law does not have the same qualities.