no doubt there is an uneven distribution of factors that will influence a person's ability to save money.
Things like race/ethnicity, education, parental involvement, intelligence, physical disabilities, personality, disposition to obesity, etc. . . can all impact someone's ability to get a job, advance in that job, and amass a sizeable stash. Many of these things are not factors that you have control over, so the extent to which you are given a hand (i.e. the mix of these attributes) that increases your chances, can be considered luck.
However, I agree with other posters who say that acknowledging that luck plays a potentially large role doesn't mean that you can dismiss the mathematics that state that the more you save, the more likely you can save a million dollars. Living below your means, especially well below your means can accelerate this. If you can save 15,000/yr which is possible for people of many different salary levels (though obviously easier for high income folks), increase that savings level by 3%/yr, and then make a modest rate of return (3-8%) you can achieve a million dollars in your stash sometime between 21 and 28 years.
I think this is what people here are arguing for.