Corrected.
I'm not sure why you'd expect there to be a built-in tool for this, since people also use character pairs such as:
!¡, ¿?, <>, {} “”, ‘’, & «»,
and paired single characters such as:
", ', #, §, |, * & ‡
for enclosing various things which, depending on the document, may span multiple paragraphs. Regardless, as the wildcard Find expressions show, Word does have the means of doing what you wanted.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]