Your experience depends on what show up in your feed. For me, it's mostly developers talking about web performance optimization, small business owners talking about conferences they've been to, people sharing posts or videos they've released... and the occasional post from the local council or someone criticizing Facebook's AI features.
Posting on LinkedIn doesn't necessarily mean bullshitting or low-value content. My two most popular posts are about single-page app performance [1] and TCP slow start [2]. And when I talk to people using our product they mention they have team members regularly sharing my posts in their company (but they might not "like" it on LinkedIn).
I might not be getting thousands of engagements, but there's little point reaching random people who aren't interested in working on the same problems as me either.
[1] https://www.linkedin.com/posts/mattzeunert_client-side-rende... [2] https://www.linkedin.com/posts/mattzeunert_resource-download...