Your entire statement is grossly misinformed and most simplistic to the point of being wrong. With your "logic," we should just get rid of all training, training agencies and instructors and just "gain the skills, knowledge, and experience on their own."
I am not sure how you can judge me as or my opinion as "grossly" misinformed given the fact that I am certified by NAUI as a Master Diver. I have taken the course of instruction, obtained the certification card, and realized afterwards that there are other ways to obtain the same level of knowledge and skill and more.
By your logic, perhaps one should take every certification course available on any subject in diving (basically the PADI mentality of Put Another Dollar In) because one will get personal satisfaction and instruction out of the course. I never implied that we should get rid of instructors or certifications....a certification should lead to something, it should open up opportunities at the least. MSD certification does not do that. You can obtain the list of course requirements and obtain the book and work on the skillset on your own with a fellow dive partner. There is no reason to spend time and money for someone to say "here is a certification card that indicates you have the skills and knowledge to teach but oh by the way you cant teach because you don't have an instructor level certificate", or "here is a certification card that states you are good enough to lead a dive, but oh by the way you can't get paid for it because you are not certified as a dive master and you also could have led a dive with just an OW certificaiton card if you are not getting paid."
I believe there is value in training, I also believe there is value in having certain certifications, I also believe that my money is better spent in my pocket or invested in something that provides me real value or return on my investment. Spending money on MSD certification does not do any of that....at least not in my mind....and I am speaking from personal experience.
It is kind like, if you can take AOW and Nitrox together, why would you want to pay a premium to take them separately if you had the chance? If you can gain the knowlege and skills of MSD course while at the same time gainiing the knowledge and skills of dive master from that course of instruction/certification why would you opt for the lesser certificaiton? Unless there are factors such as time or expense, but in that case I would suggest that the OP, or anyone is better served to wait until they could afford the time and expense of the higher level of certification.
-Z