We're going in circles and the pedantic comparisons don't help.
If you think it's pure luck, then that means building (this) business is no different than winning the lottery - which you specifically said wasn't the comparison before.
If it's not all luck, then that means success takes difficult work and odds only further show the challenge in getting to this scale, in which case it's perfectly fine to write about.
So which is it?
"a certain scale and type of success being impossible to predict, possessing exceedingly low odds, and being largely random within the pool of “people trying.”"
Ok...? This isn't relevant, it just shows thats its difficult to get there (with some luck required).