And the curtains have just opened and they worthlessness exposed

from Lupe Fiasco (Ft. Poo Bear) – Brave Heart Lyrics on Rap Genius

Meaning

It should read worthlessness, describing the industry devils and how when the curtains show who they really are and what they’ve been doing, people will realize their worthlessness.

Just like in The Wizard of Oz
The Wizard of Oz was suppose to be an all powerful being that could give Dorothy and her friends what they needed in life to succeed. It was all literally smoke and mirrors and was just a worthless guy behind a curtain. Dorothy and her friends later found out they had what they needed inside to succeed.

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