Draft -> Blind optimization in reality is...

-3 dodges (because someone didn't get his role I assume) -fighting in chat over roles (really healthy game start) -queue time of 2 minutes (because of dodges) comparing to 4-5 minutes with draft pick (and that considering splitting player pool into two queues and lower draft pick population)

I can understand that leaving more queues is bad for game time. But why not making blind pick with role selection?