I never understood why some people don't accept that it could happen to them, and learn from the folks who have been through it.
I don't understand why people in the US believe the US is immune to what others face routinely because of corrupt "leaders"- add to that why do people in the US believe servants are leaders, which exacerbates corruption- I have some ideas but when presented are ridiculed. But, I stand my ground, stand by my beliefs, gained from observation and results seen. Big Picture assessment proves my observations correct.
As for your statement, learning on the fly (on the job training) is a good teacher, probably the best-
Thankfully, some learn faster than others and become True "leaders"- "True" leadership is best defined as; benefiting the follower not enriching the leader -
back to and continuing, the learning from others; nothing worth having is ever easy. Learning from others is easy, comparatively speaking. Making your own mistakes is sometimes not so easy- like I was told when I was a kid about what does that word mean; look it up, you're less likely to forget it that way.
All one can do is all one can do and it is enough. I satisfy myself in that regard by doing my dead level best to leave my space a little better than I found it, determined by me, not a member of the collective of a society, or a "leader".
If you, as a person, feel the calling to help inform others about the difficulties that could happen in a real crisis situation- stand your ground- the Greater Good is accomplished through Individual effort- the 'others' involved (the students you hope to teach, members of society, etc.) are but a supporting cast.