One rotten apple leads to a rotten batch
I don't think so. Faulty causality reasoning there... Like the dead canary doesn't CAUSE the miners to die, it only indicates a condition that will lead to that inevitable conclusion.
So, no, one rotten apple only indicates that the conditions are present which will cause an entire batch, er bushel (paint is made in batches, apples grow on trees), to go bad.
So, unless you're saying that the conditions that CAUSED those sectors to go bad will, or, at the very least, MAY, cause OTHER sectors to go bad, well, then...
Oh, wait.
That IS what you're saying.
Never mind.