The moral of the story is:
* Don't use ultra-light handlebars - there are better places to save weight;
* Do inspect your handlebars for cracks or other damage, whenever you clean the bike and after any fall however minor;
* Also check your stem and the crown of your forks!
The fact you can ride a bike no hands is more or less irrelevant here - if your handlebars break it's almost certainly when you're putting pressure on them, in which case when they break suddenly you are going to be suddenly off balance, and you cannot ride no hands when off balance.
A broken handlebar, stem or front fork will result in a crash on at least 90% of occasions.