It's words like "I honestly don't understand why one would even need" or "even if I saw a use for that" that can convey such a meaning.
You wrote about kio_imap4 which is not used by kmail 2. Hence I got the impression that you were still using kmail 1. Especially since you cited problems that are supposed to be fixed in current Akonadi. As they are still there for you, I strongly suggest reporting them on bugs.kde.org. The developers really try to fix them but there are obviously many different problems leading to the same symptoms.