That only works in one direction though. If opportunity doesn't exist, it doesn't matter if you set expectations that it does.
Or you think its better to evade temporary failure by embracing permanent failure?
20% of children in the bottom quintile dont graduate highschool.[2]
8% of men born into the bottom quintile are currently incarcerated.[3]
The traditional advice to children for how to be in the 60% that escape poverty is still true. Stay in highschool, stay away from drugs and crime, and go to college if possible. If poor children can do this, their chances of improving are actually quite good and not at all hopeless.
https://www.heritage.org/sites/default/files/~/media/images/...
https://www.researchgate.net/figure/High-school-graduation-r...
https://www.brookings.edu/wp-content/uploads/2018/03/es_2018...