In theory, but not in practice.
In theory, because the tire is glued on, a flat will still be somewhat rideable without risk of coming off.
In practice, flats were much more common with tubulars, and, for me, at least, they were not slow leaks typical with clinchers. A slow leaking clincher will give you time to slow down.

I can think of incidents I've had with a geared bike that wouldn't have happened on a FG-, too like climbing a steep hill, dropping the chain on a shift and jamming the crank. Next thing you know I'm stopped dead, doing a hand plant because I can't unclip. But drop the chain on a fixie and you have a real problem. Nothing's perfect, I'm just acknowledging that the safety margin is a little thinner.