confused about the concept of the lumpenproletariat

Marx and Engels mention a class "below" the proletariat called the lumpenproletariat, which i understand as meaning a class that has no class consciousness, and is therefore susceptible to the influence of the bourgeoisie. but i don't see the difference between that and the proletariat proper. don't the proletariat receive propaganda to suppress their own class consciousness, and don't they have to be woken up? i don't get why the lumpenproletariat supposedly can't be woken up in the same way. besides, some examples of the lumpenproletariat given are people in organized crime, sex workers, and the unemployed. i find it hypocritical to condemn a class of people based on what they do to survive in a capitalist society (or in the case of the unemployed, the fact that the bourgeoisie won't give them a job). but more than anything, i'm just thoroughly confused by this concept. i feel like i'm missing something major.