A great post and an instructive dialogue on LinkedIn. A thoughtful question by Michael Fletcher led to Dr. Craig S Wright answering with genuine Satoshi authority.
Genesis does not just mean the beginning. The purpose of calling this the Genesis block relates to the fact that there was nothing but chaos in the beginning. The creation of the Genesis block takes data without form and void as darkness upon the face of the deep. With this, light enters, and the system forms. That is why it is a Genesis block.