Any act that restricts entry and competition within a field of employment is primarily geared toward maintaining income - not the safety of the general public.
Tort law comes into affect when there are serious breaches of public trust.
It, and professional liability insurance costs have a greater impact on professional accountability than do registration or professional licensure. Because both the registration agencies and professional organizations have minimal enforcement standards, they end up serving primarily as tax collection agencies and marketing organizations. In fact, the very professional organizations and their regulating bodies actively work to limit consumers knowledge about individual professionals. The user of design services would be better served by independent rating and standards organizations than by the current regulatory scheme. There are numerous mechanisms by which individuals or companies could obtain information about an Architects ability to serve - whether they design houses or skyscrapers.