A lot of people have known this for a very long time. Private schools and institutions like Oxbridge are said to be the cause for perpetuating reinforcing the reproduction of the ruling class, more specifically its how rich your parents are. The people in power know this.
I'm explaining it in a very simplified way but he basically says you can only get very rich if you have rich parents, because house prices keep rising, and its hard to make tonnes of money on the stock market speculatively unless you are a genius basically, you needed to have started from wealth. I don't know if he teaches it elsewhere but ordinary people have made money from stocks and shares but its not been a quick thing. It was through investing over time in global index tracker funds which have an average 10ish% increase in last 30 years. Once you hit 100k the compound interest would be exponential, plus by cutting expenditure, more would be invested. It's not get rich quick though.
He also says assets (investments in stocks and shares) outstrip property ownership as the route to wealth. I don't quite understand the interaction but he seems to explain that its because an asset economy (which we are moving to because of wealth inequality) drives house prices up so they keep becoming harder to reach. He says tax the rich and change the system.
I've only watched a couple of his videos , so I don't know if he talks about this, but I think we need to change the aspiration (glamorising on Instagram doesn't help) of being super rich.
In reality you don't need that much money to have a great life, you need enough money that you don't have to work and can spend your time freely on what you want.
If you are my generation (I am in my 40s) and not super rich then you can still improve your finances and be able to retire comfortably. And if you are young now, you can retire comfortably and have enough wealth to pass down so your kids are comfortable if you adopt a savings habit and invest and don't worry about the biggest house or ostentatious wealth.
I'm doing a really good free course by Rebel Finance School which teaches some of this.
I agree tax the rich, but also think ultimately we need to be working towards being able to guarantee everyone in the world a basic decent living standard.