It’s a bit of a hack - you typically use it for elements that are associated with another element.
The way it’s written above effectively creates a transparent layer over the .structure element (in anvil’s case the whole app)
Using it as a role would create a transparent layer over the Anvil Component
https://anvil.works/build#clone:BHDW55VPMPAT25XP=5QQTO3QLMXBOV7MAJO2HIBRE
But it’s not effective for someone determined