Why should I not wrap every block in “try”-“catch”?

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A method should only catch an exception when it can handle it in some sensible way.

Otherwise, pass it on up, in the hope that a method higher up the call stack can make sense of it.

As others have noted, it is good practice to have an unhandled exception handler (with logging) at the highest level of the call stack to ensure that any fatal errors are logged.

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