I have to look up the reference, but I have gone through a study which quotes Alister McGrath to say that he did not think CS Lewis really meant that argument as an apologetic, and that he recognized it was not powerful as such.
In medicine, one sees a lot of unhealthy or benign, and sometimes even beneficial, delusions.
They fulfil desires for solutions, security, and many other impulses.
I would love to study a year or two in this area and other branches of psych . There is so much I do not know