What is the "crisis" that Zapruder speaks about in the Afterword in the book "Why poetry?"

the crisis that Zapruder referring to is the mindset of people when it comes to poetry and study of poetry itself that some people are not being able to fully understand poetry and all the facts related to it before writing a poem and the proper manner of understanding it.

There's a way that poetry is trying to get at something mysterious and strange and difficult to reach, and so sometimes people mistake that for a code or a riddle. He wants people to fully understand what is being said inside a poem.

But a poem, in a way, is the opposite of a riddle. A riddle is something simple that's said in a deliberately complicated way so that you have to figure it out. While a poem would tell you everything you want to know.

A poem is the opposite, it's something allusive or complex that's being communicated, or attempted to be communicated, in the simplest way possible, which sometimes isn't that simple. Sometimes it's hard to talk about things, so poems can appear strange or unusual.