Why aren't all these dispossessed white boys tribing up and dominating the industries they were excluded from?

I imagine the answer to this varies from industry to industry and sector to sector. But for my sector specifically, the sheer amount of time, money, and past track record needed to secure business makes entering the sector as an outsider startup with no institutional backing borderline impossible. One could only hope to do so with hundreds of millions, if not billions, in investment.