Some folk are so dead set on getting every call out spot-on and every tiny bit of the day TOTALLY standard, that they have little spare capacity for absorbing what's going on around them.
Also there are some poor dolts who'd be bloody lost without the company teling them when to put the wheels down or pop some flap.
They are STANDARD op's. Should be varied to take account of NON-STANDARD conditions.
Also 'SOP's' IMHO should not be used to 'Dumb down' the operation to the point where fuel and time and money are wasted, simply so the weakest pilot in the company call still pass muster!