OP I think if your post had said: "I get annoyed when people use jargon out of context and I don't understand why," I'd understand and agree.
From my experience in poly spaces, queer kink spaces, and in jargon-heavy technical and academic work places, I think jargon is better described as convenient shorthand, for those familiar with it. It can be specific when used in explicitly specific contexts, but it's usually less so, especially as terms spread outside the original group using it, which will happen because that's language (hello AAVE to "hip slang" pipeline). I understand being annoyed when people use terms outside of the context where they hold specific meaning, without intention or forethought. But your post and the discussion above didn't say that, and what you did say reads like you and others are making some big assumptions about why people use the words they do.
I often interact with people who would be frustrated by my use of trans and cis -- terms which I don't think are jargon but which a lot of people around me who aren't queer or informed about LGBTQ topics do. I try to use shorthand terms sparingly and will usually ask folks if they're familiar with a term I think is jargony and will use more specific, usually lengthier language if they're not. The same as I would for any word or language someone might not know. When I do use jargon, you wouldn't know for sure if I'm using it because I'm steeped in that culture and unaware of its specificity to that context, or for reasons you'd approve of. I don't personally care if you're aware of the reasons I'd use jargon or approve of them yourself. If I use jargon, intentionally or not, and someone judges me as annoying because they think I'm signaling belonging to a group or trying to appear smart instead of asking me for clarification or expressing curiosity as to why I used that term, then I'm glad it's off-putting, because that's not the type of aquaintance I'd want to develop a further relationship with.
That said, on signaling being in a group, specifically in poly, kink, or queer contexts: If someone says they're poly, kinky, or queer and doesn't know terms people in those spaces use or is annoyed by them and judges rather than seeking common understanding, it's an indicator that they might be new to the scene and its concepts, or that they maybe haven't interacted with community spaces at all, or they have made a judgement of a word used by a group of people or the group itself. Not inherently bad things, but I'd want to know more before putting myself out there and spending my energy getting to know them. Additionally, these are groups for which not being in the group can signal you are a threat to life or livelihood. Jargon can be a good first-pass litmus test as to how a person will treat me and communicate with me, especially if it prompts curiousity vs annoyance. Is someone trying to join me, or are they judging me by the language I use?
Jargon can be used in inappropriate contexts and can be annoyingly vague or obtuse but it has a place in language and your post and the exchanges above read like you just got squicked out by your interpretation of "fluid-bonded," or rightfully annoyed by an acquaintance asking you an invasive and unclear question, OP. Or if I'm not being generous, you got annoyed that you came across a word you were unfamiliar with and that annoyance reaffirmed your opinion of the people that use it. I see it everywhere -- "poly people are obnoxious/doing too much/expect us *normal* people to use *their* annoying words." People get annoyed when others don't code switch and make snap judgements based on that feeling, and I wish they'd get curious instead.
Do you get annoyed when people speaking your language slip in words from other languages, too? Either for flavor or because they don't know another quick way to say it, e.g. "I went to the bibliotecha to get my books." If not, please consider thinking about why that's different for you. Why do some words get limited to specific contexts, and why do some get adopted into broader vernacular? What reasons might poly people, disabled people, queer people, neurodivergent people have for wanting to widen the understanding of a jargony term to people beyond the specific subculture that coined it? (And likewise, what reasons might people have for wanting to limit usage to within a subculture or community, like with AAVE). Not just to annoy you or appear smart or special.