Their whole mindset is Doomer Bluepill.
They know nothing really works, nothing has ever worked, and it's over. But they don't quite know why, or if they do, they can't bear to admit it to themselves that they know it's because they're sub-8.
So they cling to this weird idea that they can improve themselves by nofapping. It hasn't worked yet, but maybe next time will be different? It's like the bluepill's grotty cousin, who doesn't put away his porn mags when people visit.