For CA/CS/CWA , I must say that they are the only profession where you can gain trust, confidence and faith of the public. It is possible only because of the presence of the Institues of the governing Bodies.
For low results in these profession , I can say that these low results are one of the factor why these professions didn't lost their integrity and respect. Imagine a situation if, there is a result of 50% or more..then how the intergrity of the these professions can be maintained. No doubt MBA may possess some distinctt skills, but the way the MBA institues are coming with no control by the regulatory bodies, the intergrity and relevance of the MBA is decreasing. Within last 10 years , there are no. of MBA institutes in every city which are called as MBA even though they did it from anywhere. Also, In MBA, if u think of Big Schools they too have strict restrictions and evaluation process for selecting the candidate, and bcoz of that they had maintained their reputation and integrity.
For Policies and restrictions, I can say that although all the policies are not correct or the best, but they are implemented i a way, and if not suits to the students and members, i m sure these institutes will and are working for changing or improving the same for the betterment of the students and members. Also, sometimes, certain strict policies and procedures need to be made for the development and appreciation of the students and members.
In life, everything comes in a package, so strict rules and policies are also the part of the package along with the intergrity, reputation, faith and confidence u gain as a CA/CS/CWA from the society.