They probably have a no flash photography rule on the plane. But good catch. Something to keep an eye on for the future. She definitely looked and sounded “low energy”.
Modern cameras can work with low light, no need for flashes.
Another thing is annoying clicking and chatter of shutters. No need for that, digital cameras can be silent. Stoopid CNN reporters didn’t get that and are scaring Hitlery with “shots”.
They know that flashes can trigger an Illary jigglehead episode.