Came across this online. Would you say this sums up the toughest areas of the Appalachian Trail?

Mount Madison.
Mount Katahdin.
Mount Washington.
Mahoosuc Notch.
Cheoah Bald.
Lehigh Gap / Superfund Trailhead.
The Priest.

I noticed it didn't have the 100 mile wilderness which I'm told you need at least 8 days of food to make it through that.
Neither does it mention rivers.