LinkedIn (and resumes / CVs) exist for you to lie to HR and fit into the automated systems to so you can get a job. They don't exist to be uniquely useful. If they were anything but lies then you wouldn't need to deal with technical interviews as you could go off of the candidates LinkedIn or resume. As you say, it's a system that when games gets you through HR. HR doesn't know shit from anything so they pass the candidate along. If you convince HR that your shit doesn't stink they'll be convinced you're the second coming of Christ. That's the game to play.
