They lost me at "independance".
What's the rationale for enclosing the punctuation within the quotation marks? It's not part of the quote after all. What happens if the sentence is a question that ends with a quote? If the quote itself isn't a question, enclosing the question mark would interfere with its meaning.
Is the idea that quotes always should use proper punctuation too, and that if the ending mark is the same as the one finishing the sentence the quote ends, then it's superfluous to write it twice?
I realize this might not be an easy question and that the answer may well be "just because".
No, the answer is "just because."