We will only have one opportunity, so we cannot do things in layers, this is not a universe per se, this is the body of an entity and as such it must have its means of defense.
Tarzor made it very clear that if he leaves my shadow it will be noticed because he is a similar Entity or that is what I thought before Tarzor corrected me, he said that he is considered food, this entity devours universes, all these pieces of universes that we pass through and even this one where we are are being digested, so there would be no way for him not to notice Tarzor with right in front of his teeth begging to be devoured.