I dont think anyone was suggesting the prospect of a unaided delivery, simply pointing out that the actual labour does not need to be heavily monitored as the progression from first stage to second (the pushing stage) is obvious without internal examinations. I certainly didnt have an internal for the team to notice i needed to start pushing.
Shoulder dystocia is a very serious problem in labour, but is greatly amplifed and far more likely if the woman is unable to move around. In this country if a lady is stuck, she would be flipped onto all fours where the pelvis is naturally more open and hopefully the shoulder would become unstuck... its pretty terrifying though when it happens and one of the main reasons they suggest you move around as much as possible during labour. When they are not rigging you up to drips, machines and sticking needles in your spine that is...