Maybe it's dull and uninteresting but unless you keep it in mind at every layer of abstraction, you run the risk of drawing incorrect conclusions. People tend to recognize this fundamental lack of control in only the most obvious cases like familial wealth, race, nationality, iq etc.. but completely ignore it in the more subtle and important distinctions between people like early childhood experiences, stress in the household, metabolism, serotonin levels, emotional tendencies and intellectual influences. The sheer complexity involved in all of these factors causes them to be treated differently and unfairly reduced to "idk some people just get ahead in life because they work harder."
I partial agree, it's complex. Meritocracy is better than ever and most things in life can be directly deduced to initiative, work ethics, personal drive, ambition and ability to have self control. There is an amazing book "Deep Work" that goes in-depth the work ethics of successful people.
You also left out the biggest and the most important luck factor - Physical attractiveness. There are several studies in the field of psychology to mundane daily anecdotal evidence of how attractive people have a lottery ticket. I don't see this as a negative thing - genetic diversity is literally how human's evolve and natural selection works.
