for a lot of guys fapping/nsfw stuff is a way to cope with not having access to irl sex with a real woman given that these days it's becoming increasingly harder for many guys who are not very high in the looks and other stat percentile to find a girl that even notices them in first place and that doesn't see them as blending in the background with other guys/not existing in the first place
so in some ways it's more so a result than the cause/issue itself, PMO that is as some guys even after months of being on dating apps or even being outside irl still don't find girls for whom they are enough to see them anything more than platonically
as long as ur androgens/energy keeps producing and flowing it will inevitabely keep making your libido/sexual desire more pronounced so if u don't have any woman irl to indulge with in it you will end up edging, fapping or watching nsfw stuff to somewhat satiate that desire
the nofap/semen retention rhetorians ignore the lookism aspect and other social elements of this and act as if anyone regardless of their other stats or social-sexual dynamics of the world will be able to get laid magically the moment they reach x day on nofap and that just stopping fapping/watching porn will somehow solve most of their problems