Actually, I think we are in a somewhat similar line of thought. I also think the entry level to DM is rather low and I would expect a DM to have some experience if they are to lead a dive. I also agree its good to just go after rescue and dive for a while for experience (this is what I did). However, unless you are experiencing real emergencies or practicing simulated emergencies to gain rescue skills I just don't see how 200, 300 or even more dives would be better to start a DM than say 100 dives. For arguments sake, take a diver with 500+ dives who's highest cert is AOW without any rescue or EFR training. If he never practiced rescue, how is the amount of dives he's done going to help him in a rescue situation other than being more comfortable in the water? If someone is already at ease in the water and has practiced rescues and has gone through the motions of what to do in an emergency (even if its was simulated) with reasonable dive experience then I don't see why they would have to hold off and do even more dives. I would agree that in an ideal world all DMT's have more experience than everyone... but then even more experienced divers will come a long and claim you don't have the experience. It's a vicious cycle!
You are equating certifications to experience and that is not the case. You could have your drysuit certification and your 2 or 4 dives necessary to get that cert and on paper APPEAR to have experience you do not have. I have no drysuit cert and over 100 dives in a drysuit. I guarantee you that I have more experience in a drysuit than you do. Experience matters and dives, actual under the water in the wet world environment, build experience.