You are making two mistakes here: the simplest one is thinking that the winner of the argument is whoever has the last word. This is very frequently not the case, as any troll could tell you. Often, the power move is to get opponents mad and then move on, leaving them impotently fuming about how terrible that person is.
You're also identifying with the larger group at the societal/species level, which is valid, but is also a way of ignoring problems in the here and now. It's like zooming out from a bloody battlefield to look at the earth in space. With an extraplanetary perspective, Earth looks so beautiful and peaceful...but that doesn't help a single person who is impacted by the bloody battle.
This is contradictory. Not every reader is going to "stay in the end" to learn what's really true. The past few years have given plenty of evidence for that.
And that's where authoritarian regimes get you. People usually aren't that invested in a conversation, or in disproving firehose of falsehoods style comments placed by people incentivized monetarily to make sure the correct opinion stays in the end. If the platform has rating system they also generate accounts to manipulated it for the same purpose.
How do you define a lie? Please be precise. What source of truth is used to evaluate possible lies, and who gets to make the final determination? What level of confidence is required? Does intent matter? Does a statement count as a lie if it is factually correct, or at least not provably incorrect, but still potentially misleading or lacking relevant context?