I think the argument in favor of the media outlets that used the freelance reporters is
These reporters are ordinary Gaza citizens trying to make a living off freelance photography
They were tipped off that there will be photo worthy activity near the fence but have no idea what actually will happen
Once they were there they photographed everything they saw
They had no ability in stopping anything as they weren't armed and stopping hamas would result in them being injured
If this is the case, the media outlets believe that there is no moral issue purchasing images from these photographers
@CountValentine did I get it right?