Weakened Unbreakables are still stronger than normal people

“So you both knew you were leaving Eden poorly defended.”
“No,” said Kennedy with a shake of her head. “We’re still the best choice to be up here. We may not be as strong as we were, but all of us are still twice as strong as an average adult.”

Excerpt From Ex-Isle, pg 519
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017