It's worth remembering that those camera views of the wing are NOT being displayed during landing - rather those displays are showing the stuff you actually need to, you know, LAND THE PLANE!
Now, after landing, and hearing that they may have a fire, it
may have occurred to the flight crew to pull up the camera view - but that takes multiple keystrokes (it's not simple button push) at a time when they are dealing with an emergency and going through checklists.
My money is that checking the camera never occurred to the flight crew, or if it did it was after the event, when the fire was out, the passengers being safely evacuated, and their pulse rates had dropped below 100. Along the line of 'you know, if we'd thought about it, we could have pulled up the camera and seen just how bad the fire was'
