This is important. So much of our knowledge of the past has been dictated by what may have been dug up and that means often been just lucky. Here we have known about Bronze Age Crete without understanding that the collapse put Knossos in a safe place to rebuild.
That held true for the Greek cities as well which retained much of their bronze age world about themselves. Athens survived and emerged.
Much was lost in 1159 BC but the Eastern Mediterranean was sufficiently removed so as to be able to ride it out. The big losses took place in the Atlantic and this severed the whole bronze age trade enterprise and collapsed the copper economy centered there.
Ancient Knossos flourished after collapse of Bronze Age