Also, as far as anectodtal evidence goes, you are not an NT, so how would you know how it feels like to be one? How can you be sure that your perception of what the NT is feeling is not merely the projection of your own feelings?
So? How can I know that people who
do express emotions actually feel them? I can't, they could just be faking it. Even I have behaved as though I liked people I disliked because I didn't want to face the social consequences of being perceived by others to dislike this person. Expression doesn't prove anything. It's very possible that any emotion I perceive could be fake, or a reflection of my own. I just like to believe it isn't so.
My point is, it seems to me they usually do express them in some way, it just isn't as direct as the way Feeling types do. For instance, they might try to help you understand something, or try harder to understand something you're explaining to them. The first few times, it might just be curiosity. But the more times they help you, the more interested they seem interested, the more likely it is that it might be due to an emotion towards you. You'll never know for certain, but it's easy to infer.
Even if they don't feel anything, they're certainly interesting to talk to, and offer a lot of potentially helpful advice and perspectives on things. Thinking about how they have no emotions would ruin that for me, and I see no reason to suffer from that awareness unnecessarily, especially if they can approximate the sort of responses I need to perceive well enough to satisfy my perceptions.
Finally, what are emotions anyway? It's possible that they are nothing more than a particular type of brain activity or expressive capacity that T types lack. Should I dislike someone because they lack a particular awareness or brain activity? It may mean that I should be less trusting of them not to use anything that could benefit them against me unless I have something equally damaging to use against them, but then that wouldn't be particularly intelligent in any case. It would always be a risk.