Immersive journalist experiences are easy to attack people even if the topic of the VR experience is unappealing. In 2016, if you asked the average person to experience a 5 minute VR documentary of what it is like to be a chicken in an unpleasant factory farm environment, many people would say "Yes!" Because the need to experience VR outweighs the unpleasant nature of the topic. If you asked someone in 1995, "would you like to watch a very boring 5 minute movie in 3D" many people would say "Yes!" As in 1995 any 3D movie was a new experience. If you asked someone today "would you like to watch a boring 5 minute movie in 3D" today almost everyone would say, "of course not."
VR documentaries are only appealing now because they are new experiences. When VR becomes ubiquitous or more common in 2020, it will no longer have the appeal of being a new experience. Therefore, no one will probably want to watch a VR documentary that is meant to be a wake-up call when one can experience a VR experience that is pleasant and entertaining to watch.