Yes he could well be.
In the days of tubed cameras, bright lights could damage the phosphors on the front of the tubes.
In earlier CCD chips, bright lights left vertical smearing. This has reduced largely to changes in technology and the way the CCD is accessed. However, intense bright light of the type created by a flash gun at close range into the lens is focused into a tight beam straight onto the CCD. It is entirely possible that this could damage the chip and with the cost of a DigiBeta camera, the cameraman is right to be concerned.
You will often see flash lights in news stories but very rarely will one be aimed straight down the lens.
The same of course applies to direct sunlight.