The strength of a theory can be gauged by how well it stands up to attacks and how well it incorporates new evidence.
To explain away the Cambrian explosion has been and remains a high priority for Darwinists.
The dominant pattern in the fossil record is explosions of new biological forms. The Cambrian explosion is a prime example.
In short, the sequences performed no new function, so no new information was created.
Paleontologist Günter Bechly was a proponent of Darwinism until he discovered significant scientific reasons to doubt the evolutionary story.