There are plenty of reasons not to try any random thing that enters into our heads

...and most of those reasons are fallacious.

The opposite of every Great Truth is another great truth: yes, you need to look before you leap. But he who hesitates is lost. (Or in Richard Bandler's version, which I kind of like better, "He who hesitates... waits... and waits... and waits... and waits...")

When did EY demonstrate that he's a master, and how did he supposedly do so?

I never said he did.