Earlier quoted context omitted.
FYI: Apple’s pinch to zoom lets you rotate and drag not just zoom. This kind of subtle differences matter quite a bit from a UI perspective. You could have a punch to zoom system where a pinching motion always resulted in fixed changes to zoom levels. You could describe both implementations as “pint to zoom” but one is a lot more user friendly than the other.
I can't rotate web pages in Safari, there's plenty of situations in Apple's first party apps in iOS where pinch to zoom is purely a zoom thing. In any case, the rotation thing is also just pretty rudimentary trigonometry/linear algebra.
Also, Boxed already replied by complaining about rotation in the Map app imagine the hate if Safari did let you rotate. Removing features is just as critical for UI design as adding them.