While I understand the author's perspective of the ease of smartphones for photography he is really only viewing a subset of photographers. In this instance his audience would be photojournalists who need to minimize the time from capture to presentation. Once could also see those casual users who want to share their images on social media quickly too.

The author's view excludes fine art photography as well as a number of other types which value quality of speed and quantity. If you need or want to deliver images fast then yes camera companies are in 'denial', but I would argue the majority of photographers aren't.