If it's alexithymia or such I hope you have trusted people in your life you can ask about random people.
On the flipside if that kind of thing is due to being on the schizo spectrum I can say with personal authority that yes it's very much possible: Figures it's not that I can't do it it's that I had a life-long habit of actively avoiding tuning into random people, the resonance being so strong that their neuroses get me all cramped up and swamped with random shit requiring clean-up after the fact. But deep dives aren't really necessary for a threat radar what you're primarily looking for is their attitude towards relating on eye level, whether there's an inferiority/superiority thing going on.