That might be because you're more interested in what is objectively true. I am currently more interested in what is subjectively true (what people believe, their reasonings, etc). It helps me to understand the human mind, which I'm currently trying to investigate.
*Yet again*, you didn't carefully read what I wrote. 1. I never claimed my interest was "just" psychology. 2. Even if my interest really was "just" psychology, the case people put forward would still be important, for various reasons.
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