The consequence of continuous introspection.
The recipe for a happy life is to tread light. When you get what you want with minimal effort a la normies, they don't have the reason/drive to dig deep. One has to be very careful when dealing with the external world as an incel because blackpill trains one to look beyond what is on the surface. When you don't feel belonged and aren't keeping yourself updated with normie spheres of influcences then this 'i don't know what to day anymore' happens.
And this exactly is how incel tendencies are sniffed by people.