LinkedIn posts get answers when there is one detail to answer
The LinkedIn posts I end up commenting on usually have one concrete thing in them: a price, a tool name, a mistake somebody made and what it cost.
A post that says "consistency matters" gets a few polite likes. A post that says which weekday worked for you and roughly by how much gets replies, because readers either saw the same thing or something different and want to say so.
So before I post, I look for the one line someone could disagree with. If there isn't one, I add it or I don't post.