… esp. in contest or debate.
Your “metric” does not fit.
In fact, Christians themselves are more likely to care about atheist apologetics than the average non-religious person.
And this is a disadvantage (using the word in its common meaning, not as a disbenefit or a metric-of-level-of-engagement) how? It means that the people who are most likely to care about a work are those who have a possibility of having their worldview changed by it.
Note to mods – this discussion is about Atheism NOT “Sin and Grace”