How would you contrast this 'echo chamber' perspective with a more realistic one? Is there a strong conservative movement among the young which is underrepresented in this article?
For them the only prospect is to ingratiate themselves through the basij and other similar organizations so they can then gain employment with the government or with the many bonyads which overwhelmingly control the Iranian economy.
Employment with the government or bonyads is not based on merit but through a test of loyalty to the Islamic revolutionary ideas. If you can distinguish yourself through zealous service and unquestioning devotion, then you stand a chance of gaining a foothold.
By the by, the Basij were the ones on the front lines in the 2009 protests brutally suppressing the street marchers.
That's the only possible avenue of advancement for the vast majority of Iran's youth who do not come from a 'connected family' and/or do not have a wealthy family that will give them a leg up.