Comment by chuckadams

It's fine, the content of an expanded variable isn't parsed further:

    $ touch "foo \"bar baz"; for f in *; do echo "$f"; done
    foo "bar baz

    # quotes don't affect it either
    $ touch "foo \"bar baz"; for f in *; do echo $f; done
    foo "bar baz

Though once you start passing args with quotes to other scripts, things get ugly. Rule of thumb is to always pass with "$@", and if that isn't enough to preserve quoting for whatever use case, write them out to a tempfile instead, or don't use a shell script for it in the first place.