Everyone has emotions, yes. It's likely inaccurate to make your extrapolation though - irl I keep how I feel mostly to myself and for myself. It's fair to say INFPs are "whinier" than some other types since the things that stand out to us are usually things that we perceive as "wrong" and we get into complain mode, especially to those close to us. Myself as a 9, most of the annoying little things to me are never expressed out loud and my demeanor is friendly and pleasant 99% of the time. That's what 9's do. So, what you see here would be different than real-life, since to be as candid as you saw above, people like [MENTION=25403]ZNP-TBA[/MENTION] would punch me or encourage others to do so.
So, think of it as Fe expressing emotion to a purpose. It's about the push and pull between people to accomplish a goal. For Fi, the emotions are data, utilized to inform the judgement function and outward expression is more about being honest to how we are feeling interiorly than using them to do anything in the world. It's like, I am so tired of seeing the double-standard in judgement around here that the social price to to speak up is smaller than the importance of upholding the internal value.
Yeah, I'm sure Fi users aren't as expressive irl as they are on here. Neither am I, which is why when I've seen people start complaining about things like Fe being forceful and controlling and overly expressive I get annoyed since I'm nothing like that. I have a strong 9 fix myself (half the forum is still convinced it's my core but I disagree).
My main beef is with stereotypes of the functions in general. The Fe and Si ones just hit home for me more since those are my functions, as I'm sure Fi ones affect Fi users more, etc. I can't stand being judged or seen in a wildly inaccurate way. The ones that bother me the most are the claims that Fe doesn't have any strong personal values, that they only care about what's popular in society at the time, that they can't be moral crusaders because of the hivemind, etc. And I've described my huge beef with Si stereotypes plenty of times elsewhere on the forum.
What really bothers me the most is that it seems to me like most people
don't even care that they're stereotyping so wildly and inaccurately. They're totally fine saying "You're an INFP because you have strong personal values, Fe doesn't do that" or "You're an ENFJ because you care about others, Fi doesn't do that." I can't stand the what's my type subforum because the typings I see are usually extremely shallow and based on stereotypes. Just because Fi or Fe does something doesn't mean it's exclusive to the other feeling function.
To use a personal example of how I
actually experience Fe, since I'm bored and on the topic: I definitely have strong values that go against the grain and I will never compromise on because they matter to me personally. That's not a strictly Fi thing. However, if I'm surrounded by people who I know don't value those things, I'm less likely to speak up in order to "keep the peace."
My sister recently told me that pretty much everyone in my family hates me. My mom thinks I'm an asshole, my extended family thinks I'm an asshole, she thinks I'm an asshole. And I found myself thinking, "I'm an asshole." Why? It's because
if everyone around me is telling me I'm a certain way even though I don't think so, then they must be right and I must be wrong, otherwise I wouldn't be the only person who disagrees.
Fe lets others' opinions affect it more than Fi does. I'm under the impression (correct me if I'm wrong) that Fi would be more like "Fuck you guys, I know I'm not an asshole just because you think I am." Now, people water down this aspect of Fe to "they blindly subscribe to the hivemind" which is totally untrue.
Fi gets shit for being untruthfully seen as "a pretentious stuck-up stick in the mud." Though I'm less familiar with those details, since I'm not an Fi user.