People here should be familiar with this dynamic.
Aside from being overdone, the reason it bothers me is because it distracts from so many other points. In this case, it distracts from the main point of the article which is that not having a fallback position leads to higher commitment. It's a lesson larger than just the warfare and politics examples given. It has very broad applicability in life.
That's what the article claims, but that doesn't necessarily make that statement accurate.
There's no proof Cortez et. al.'s troops actually felt higher commitment as a consequence of having their ships burned - we are expected to conclude that's what happened, but we have only Cortez's word to tell us this and an article demonstrating selection bias.
This is a natural human response. Relatable even without testimony from Cortez's troops.
So sometimes having the backup plan let's you make better choices.
The secret to being a trader is to not risk it all, to be there tomorrow to claim tomorrow's profit. Or perhaps the secret to poker is to stay in till you have a winning hand then risk it all.
But We have made lottery winners our heroes - I fear this is entirely the wrong model.
NB Ceaser invaded Britain and definitely did not burn his ships - his mission was not conquest of Britain but political gains in Rome. Caesar may have risked it all - but when the odds on him where around 50:50, not at Cortes' level of risk. To me the difference is profound.