Title insurance protects the title. Nothing more nothing less. This isn't a title issue.
Why is everyone on this country so quick to want to sue? It is ruining our society. The fact is the house DID NOT suffer any significant harm from the defect. Had that happened, it would be a different discussion. Life is risk, we are at risk every minute of the day and there is not some god given right to be compensated for that risk at every turn.
We don't know the full story nor do we have full pictures or a personal review of the house. We also know it is a 21 year old house. To my eye it looks like a builder defect, no one came in and removed a chimney. We know that the builder and all the city code enforcement people missed this. We know two inspectors recently missed it. Depending on how many times it has been sold multiple others might have as well. What in our society makes it not only all right but common practice to try to gain a personal windfall over something that "MIGHT" have been terrible.
As a professional inspector and person, I absolutely think that the defect should have been found. The fact that so many professionals apparently missed it over the years makes me wonder. Would love to personally look at the house to see. Love to think I would have found it on an inspection, but I cannot say that for sure.
Yes, the OP may have chosen not to buy the house. But more than likely he would have still wanted the house and wanted the problem negotiated and fixed. Only he knows that.
I absolutely think that the inspector should have some liability here - more than just his fee as the limited liability clause will say, unless there is something weird that truly hides this issue unless you crawl back in a hard part of the attic. It may not be his fault, but he was the last one in. By what reasonable thought process other than greed and enriching lawyers and continuing to ruin this country does that translate to suing for some arbitrary large amount of money? Why is going back to everyone that ever touched that house and suing them even remotely considered a reasonable course of action?
Rant over. Done looking at this thread.