My point exactly.
I understand you are saying it doesn't have to be theological if the designer is not God, but the focus on the designer is the same. It isn't biology anymore but cosmology or theology or designerology -- whataver you want to call it. It is talking about your ideas on what a good designer would do.
If the design inference has any relevance at all it has to make some assumptions about the motives, methods and goals of the designer.
I realize that the official Wedge position denies this, but without characterizing the designer, the concept is vacuous.
One of those concepts that is not simply wrong, but worthless. It doesn't inspire any research because it doesn't predict or rule out anything.