If you don't think Fe has at least some degree of fakeness in it, just wait until the next time you hear an INTP using his Fe and then ask him "OK, now tell me what you really think?"
Example: If I have a 9am meeting with a group of people, and they make me wait 20 minutes when I have things to do, Ti isn't going to be very happy. But, when they finally call me into my appointment and they say, "So, how's it going?" I will respond with, "It's going good, thanks for asking. How are you guys?" That's Fe. I'm pissed inside, but I'm showing a friendly face.
It's "real" because I genuinely do want to know how they are doing and I genuinely want to focus on the good things of the moment, rather than the bad things. I'd rather have these people as friends and respected colleagues than to not be their friends.
It's "fake" because inside I'm really pissed that they made me wait and they have no regard for my time - but, I don't show that - I only show the Fe part.
This stuff happens all day, every day. I see it as Fe "covering Ti's butt" and smoothing out Ti's rough edges - because Ti is unrelenting and extremely critical of inconsistencies - it notices everything. So, Fe smooths it out. I see my Fe as an asset in light of my Ti. But, yes, it does have an element of fakeness because it covers over what is going on underneath the surface sometimes.
For an Fe-dom, this might not be true. Fe doesn't need to "cover" over anything because it's the lead function. In my case, Ti leads but sometimes Fe needs to be brought in to smooth over the situation - to cover for Ti's weakness or blind spot.