Sure they have (had) another choice: they could have taken employment at a more stable (possibly public) company, where compensation would have been more predictable.
But they chose to work at a smaller, private company, and accepted private-company equity as part of their compensation, which 9 times out of 10 ends up being worth zero dollars. This idea that they're somehow entitled to a payout is ridiculous.
The situation that the VCs and founders are in is often enviable, but isn't really relevant here. Regular employees need to be financially responsible about accepting jobs with private-company equity comp, and not expect miracles. That's the bottom line.
(I agree that "holding the bag" is a weird way to frame this, though.)