I’ve always been a firm believer that the gear is less important than people think. When you realize what a photograph really is, all the technological stuff starts to fade away. Photographs are not about megapixels or dynamic range, but stories and moments.
Personally when I don’t have any of my cameras with me I use an iPhone, because the best camera is the one you have with you!
The choice of focal length, shutter speed and other settings affect the outcome when the shutter release gets pressed and when being trained as a photographer, objectivity is essential. The photographer has to master all the techniques that will compose the work through practice and studies, but after education comes personal taste, which is purely subjective.