Excuse me for being direct, but do you mean to say you don’t care about other people, only whether what they say is accurate and whether they can communicate it without emotional reaction?
I view all interactions as transactional. Some interactions are net-positives, but most are net-negatives. I value those who reciprocate and avoid those who do not.
From my perspective, your question is quite nuanced. I do not value people (in general) because I place no value on life. We are born, we live, and then we die. In time, we will all be forgotten. The outcome is absolute.
This level of optimization away from other humans in my experience tends to come from specific forms of introverted high intelligence (interaction with others is a net loss) but also specialization functionally/professionally away from interaction with humans (typically toward machines, or at least into more constrained work environments).
I haven't yet found something I feel passionately about. I recently finished refactoring a pid-free analytics application but now find myself without motivation. I love solving problems but dislike the rest.
I'll look into the niches you mentioned. Thanks for the reply and your time.