Only the fool declares a point of no return. You can always do something about it.
There are situations where the varying potential outcomes of continuing forward are all better than stopping or turning back. And there are situations where stopping or turning back would be catastrophic.
Lame examples I've encountered, due more to laws of physics than social dynamics:
1. When I went paragliding, I watched the people run down a slope on the crest of a mountain. If the wind did not catch the chute, and properly deploy it, they would collapse the chute and try it all over again. But, too near the edge, there was a point of no return, where you could not collapse the chute, and would be dragged off the mountain if it was partially deployed, and you tried to stop. So, if your chute was partially deployed at that point, you had to just keep running, and fling yourself off the mountain, and hope that it fully deployed before you smashed to bits.
2. When I went skidiving, once I climbed out of the plane, and was hanging onto the wing, there was no way back, except by plummeting down. The guy ahead of me froze up, and just stayed there, so the instructor kicked his feet out, and forced him off the plane.