The TEDx presenter ignores the elephant in the living room: The finance industry is one of the most highly regulated in the world, along with medicine and nuclear energy.
When pro-regulation activists use the term 'deregulation', they refer to partial regulation and not the absence of regulation.
The S&L Crisis and the Sub-Prime Crisis two decades later were enabled by freedom to initiate risky loans coupled with government guarantees. The only way to know if regulation is preferable to laissez faire would be to repeal all financial regulations, and let banks and mortgage lenders operate with the same freedom and lack of government guarantees as hairdressers, landscapers, and pool cleaners.