A doctor will typically study for his doctorate for 6 years or more, wheras realistically the ACS could be passed by someone reading the right books and studying for a month. I don't object to proving my competence every five years, what I object to is the fact that I have paid to prove it by doing my ACS and getting my certificates and yet I am forced to pay to put my name on a register I have no desire to be listed on before I can work.