He may not be planning on a "next gig" — he's 64, so edging close to retirement. I'm assuming as a corporate VP at that age he's probably got his pension sorted: he probably feels able to make a principled stand in a way that, say, a 34 year old (or a 44 year old) couldn't.
That definitely puts things in a different perspective. It can't really damage his career much when his career is 20+ years old. At this point, if he doesn't have his own side gig, lots of companies, big and small, would still want him.
Even so, good on him for speaking out.