But the residential side did not work out, so what makes you think it would work for the res side now?
On the CG side, they have a set of factors present that are not there on the Res side that favors their outcome. 1) the increased coursework, and tests and time training acted as a kind of "college", in the sense that it created a barrier to entry and serve to t weed out those not capable of passing the tests/grasping the material. 2 ) The commercial work comes from more diverse sources, which did not allow AMC's or in the old days, mtg brokers to function as the worst "selectors" of who succeeds- in the mortgage broker days the prize went to number hitters, now it goes to cheap and fast.
CG side still has a number of high quality appraisal companies that offer supervised training, something that has virtually disappeared from the res side; which means the results of self monitoring would be even worse going forward on res end of the business.