Why there are "Nones"

Because religious faith is a spiritual conviction that does not rest on physical evidence or logical argument, no presentation of scientific knowledge is likely to be convincing or be met with a rational response.
That's possibly the most frustrating/sad/true statement that can be made. Our minds can be cured, but the Faith disease has rejection of the cure built into it. We need to work harder on preventing youth from getting infected with dogma so we have fewer and fewer cases to cure later in life, because curing them is very very hard (as we all know too well.)