That's not logical; if it was, then the "solidarity" between you and Lexicus here would also be due to being in that group.
That's because the problem here isn't "cis" and never was, it was peoples' discomfort with a label that they're unwilling for individual reasons to spell out explicitly in a lot of cases.
Moriarte called it "dubious", Snowgerry interpreted this as "meaningless", and you're sticking to "very few care to identify members of that group" (citation needed). These are all individual arguments, and yet you're all showing solidarity against trans people allegedly "othering" the poor cis folk.
I don't feel othered. lexi has said the same thing. If there is no solidarity, you can't claim consensus on arguments. But you're both trying to claim consensus (about what cis folks feel about "cis") and insist there isn't a consensus. That reads a bit like having your cake and eating it (excuse the idiom).
Like sophie said, nobody's forcing you to be in this thread. Nobody's forcing you to be in any LGBTQ thread where the label "cis" is often relevant to the ongoing marginalisation that trans folk suffer from on a daily basis. We've all been asked "how often do we use it" and most of us - myself, lexi, etc, included - have said "barely". It's only relevant in a specific context. I don't go to my wife in the morning and say HELLO MY LOVELY CIS WIFE. It doesn't happen lol. I don't log onto a forum to argue about support for mod tools for a video game and go IF YOU'RE CIS, IGNORE THIS. Or whatever. That'd be self-defeating anyway
If you object to the label full stop, then you need to have an argument that extends beyond the individual. If your objections are personal, why are you engaging repeatedly on a topic where it is useful context, regardless of how it may affect you personally? You disagreeing with that label applying to you doesn't mean it doesn't have a greater use, you see.