Everything for you - to keep you in bubble. If you really ask "why", here is why.

When an edit is rejected, it is better not to notify author, because he will come back soon and suggest an edit again.

This is a known problem when two users disagree with each other. Wikipedia has "page lock" because of this that is applied almost to any "mass" page, like countries. Because some people do edits for trolling and they love to repeat suggesting a rejected edit.

That is why obviously notifications are not sent when edit is rejected to avoid reminding of that edit which might have been very episodic and not very valuable. If author was notified of this, he will become upset with some probability.

Everything for you - to keep you in bubble. If you really ask "why", here is why.

When an edit is rejected, it is better not to notify author, because he will come back soon and suggest an edit again.

This is a known problem when two users disagree with each other. Wikipedia has "page lock" because of this that is applied almost to any "mass" page, like countries. Because some people do edits for trolling and they love to repeat suggesting a rejected edit.

That is why obviously notifications are not sent when edit is rejected to avoid reminding of that edit which might have been very episodic and not very valuable. With such notifications, the author will become upset. See, bubble.