Fe deals with the emotional atmosphere. Then this shitty misconception about how Fe ego types propel fake emotions came along.
Fe types don't deal with fake emotions. What they deal with is real emotions. Why they're referred to as "fake" by non-Fe valuing quadras is because to the Fe devaluers, even attempting to preserve the "emotional atmosphere" is a superficial thing to do. It's not that the emotion itself is fake, but that what is going on can be perceived as being something which is entirely unnecessary. And to a Fe devaluer - a Gamma, for example - of course it's fake, because they don't like upholding emotional atmosphere for the sake of harmony in said atmosphere.