Does This Debunk the "Coolant Can Flow Through the Radiator Too Fast" Idea???

Why bother with a thermostat. What do you think the thermostat does. Please tell me if it does not slow down the flow what is it there for. according to everything I've read here and all the so-called studies if the water goes thru fast enough you don't need a thermostat or a fan for that matter just change out your rad and pulleys. Why do you think a thermostat opens at a certain temp. Why would it restrict how much coolant it allows thru. Make some sense off it all. I understand if it's in print or on the computer it must be true. DO YOUR OWN TEST!