Well, in a lesser position, I used Fe to help me know how to respond to people.
It's not that I like to force people into a category, it's simply that operating by Ti means unless I know the "definition" of someone (i.e. their essence as a person), which also demands reading up and/or prior experience of them in some way, I have no idea how to interact with them and thus I get very anxious.
It's usually easier to figure out a role first, if you're introverted and meeting strangers.
So you interact with them in the way their role casts them, then be open to change as you get to know more about them and can evaluate/assess by your preferred function instead of the more obvious social role they've been cast in.
When I was younger, ESFJ types used to upset me, but I think that was the problem with the ESFJ and not with me necessarily. Nowadays I find ExFJ pretty easy to adjust to, easier than Fi-oriented people sometimes. Fe as a primary will adjust to changing circumstances more easily than P-primary introverts tend to.