When discussing the differences and the pros and cons of science and religion as cognitive methods, people often put forward the view that science is not everything, and science can make mistakes. This is obviously correct. But in that discussion, no one claimed that  Under the condition that science is always correct, actively inserting this view is obviously using the fact that all cognitive methods are not perfect to deliberately confuse different cognitive methods. This is extremely misleading.
The idea that science can go wrong can sometimes confuse the audience is what the author wants to say according to this text.