Blind luck implies it was a metaphorical dice roll in which the person had absolutely no impact, which is demonstrably false. Sure, there are plenty of folks on trust funds or with large inheritances who basically won the genetic lottery. There's nothing wrong with that, but that's not who we're talking about.

Even people like Gates, Musk, etc would probably agree they had a healthy amount of luck. Being in the right place at the right time, starting a conversation with the right person, being in the right college course or being at the right college. But saying that the primary cause of wealth is blind luck eliminates almost all the personal agency and hard work that actually goes into being a successful person. Maybe they wouldn't have gotten where they are without some luck, but the same amount of luck + being lazy would leave them just as poor (or worse).