Pretty obvious, really.
Nothing, but nothing, can replace the learning curve derived from the 'half crown/sixpence syndrome' experienced by exposure to an out-of-the-ordinary or, more particularly a life threatening situation. Talk about it all you like but it only really registers when you've 'been there, done that and got the tee shirt'. Even then, there are those who don't make full use of the experience but TALKING about it is no substitute.