So... 7-8+ years ago?
Harrison was a 3rd round pick. That's a high pick for a ILB? I don't know that you could call a 3rd round pick a high pick for any position. Maybe FB, Punter, or Kicker.
Daryl Smith signed in 2014. That's 8 years ago, and that wasn't even a big financial investment. We waited well into FA for that one and got him at a bargain.
We draft linebackers. We don't necessarily pay them, and as far as I can tell, we never go hunting in the top tier FA market for one.
Competitive offer to Wagner makes some sense, but that's literally the first time I've seen this team take an active and significant financial interest in an ILB in many, many years. Your examples are pretty good proof of that.