The bolded leads me to believe you're not really following his point. It's not about gaining skills that help in the moment,
it's about learning and operating trades that didn't require a formal education (90% of blacks were uneducated at the time) so we have an economic foundation that allows us to comfortably invest in the education and development of our children.
The main flaw in his argument was his assumption that whites would spend money with us if we operated businesses that manufactured wares and materials they needed. It was a lot simpler for them to re-enslave us via sharecropping and prison labor and keep the money for themselves. Eventually he learned as much when he saw Jim Crow arise in the South... Rich white people couldn't picture life without free labor and poor white people couldn't picture life without a permanent whipping boy