Why are Exceptions said to be so bad for Input Validation?

Question

I understand that \"Exceptions are for exceptional cases\" [a], but besides just being repeated over and over again, I\'ve never found an actual reason for this fact.

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Answer 1

One problem with using exceptions is a tendency to detect only one problem at a time. The user fixes that and resubmits, only to find another problem! An interface that returns a list of issues that need resolving is much friendlier (though it could be wrapped in an exception).