I believe they did not invite proponents of ID, because ID presumes things outside of focus of science, and the focus of the conference is science. If a conference had been on a theological topic, science would have been outside the focus
Let’s remember that how God caused all of creation to come into being is beyond what science can determine. What science does is to point to the evidence and say that it seems most likely that it happened a certain way physically.
The faithful ought not to confuse science with Scientism. We need to contend with the latter, not the former.