Being in nursing, the function of Fe has started to take on a whole new meaning for me. I think Fe people have the most genuine empathy towards people and also energy to help.
I feel that I have a lot of empathy, (just being a feeler) personally. I'm rather selfish about it though. Like, I feel like people's energy affects me so much that I just withdraw, become selfish, and get tired and feel like I can't do as much as your average Fe. I'm better off acting from a distance, by talking and care planning, (Ne and Fi). We have one other Fi/ Ne who is the same way. We can talk and write about what the best things are all day but when it comes to the sick patient day to day, we get drained faster than our FJ cohorts.
So yeah, healthy xxfj's all shine in this area.
It's like, if you think about it, Fe tends to be all about other people which can be great when healthy, (or manipulative and such when not.) Fi is just about personal values,good and bad, so in this society, that can very often mean individualism, which can lead to selfishness and self absorption and lack of empathy in some cases. (I think that being all about personal values often leads to those things anyway, no matter what they are.)