After all, a one engine inoperative GA is flown manually
Why? I mean, automatic go around is available in a one engine inoperative scenario, same as autoland to CAT IIIa standards.
And yes, of course a dual engine go around is simple enough to fly without any help, but is very rarely trained and very uncommon in normal flight operation. And then, it is not that simple anymore if the last time you did it was 10 years ago during your initial type rating...