Nothing to do with atlantis and he is not suggesting it.
It isnt like finding archimedes spiral on a rock in africa or easer island, the minoans have influenced the greek in a great manner.
To find two identical spirals among two cultures of which one was the older and was known to have influenced the other (and perhaps vice versa) is enough to raise questions concerning the origin of the spiral.
And the math that it required.
Hexagons are found in both math and nature. But if I draw a hexagon, that doesn't mean I invented life in a test tube.
The parallels between math and art are well known. Sometimes art is just that - art. A testing and discovery of forms and figures.
"To find two identical spirals among two cultures of which one was the older and was known to have influenced the other (and perhaps vice versa) is enough to raise questions concerning the origin of the spiral.
And the math that it required."
Maybe they just saw a snail and admired the spiral shape of the shell. No math needed, but it is a perfect expression of the golden mean.