I think NoFap is a reaction to porn addiction. In that sense, NoFap appears to be about abandoning the simulation of emotional, romantic, and sexual intimacy and its hijacking of the pleasure centers of the brain and mind's self-deception of having romantic intimacy via said media.

I don't know much of it, but it just seems that people in the modern era struggle with respect for women/men/people outside their sexual dominions, romantic prospects, self-respect, rediscovery of the self, emotional growth, and maturity and find bizarre communities like this in their journey via self-help.

Look at me now, I'm unalienated from myself and from others! but by identifying and compartmentalizing sex/porn addiction as the cause.