It's true you can't disconnect the decisions of the business from the ones making those decisions. But you also can't hire your way out of current problems, especially hiring lower in the organization and hope for change. To completely reboot a company's decision-making culture by way of importing new people without a complete reboot of leadership is very difficult. And even if you could completely replace everyone in the organization from the very top to the very bottom (which is an impossibility), you're still left with the legacy of existing customers and technology as well as your brand and reputation and relationships. Simply put, changing people is not a solution to these problems. People and decision-making relate to each other, but as time goes on, the ability for one to impact the other without regard to the existing impedance in the organization and market is limited. This is part of the Innovator's Dilemma (https://en.wikipedia.org/wiki/The_Innovator%27s_Dilemma)