Sure, but that still doesn't matter: the fact that I wrote my previous comment is what caused you to write your response, but it's not like I had a choice to write that comment or some other: the fact that I wrote that comment, as well as everything that led to me writing it (conversations with teachers, my parents letting me watch English cartoons so I learned English, etc), were predetermined the moment the Big Bang happened, or they're just a quantum fluctuation.

What I'm saying is that there's no logical point to the concept "should" unless you have some concept of free will: everything that happens must happen, or is entirely random.