Yes I do understand that at certain busy airports with complex Go Arounds it might make it simpler for the Children Of The Megenta Line to keep the Autopilot engaged until 'assured' landing is likely. Heck, why not just do an Autoland anyhow.
But, in truth, if I have to GA with the autopilot disengaged its not all that hard. Throttles up to TOGA, point it skyward, call FLAP, and GEAR UP.
Then you can reach over, push the AP PB and push heading for NAV.
Really tricky, eh?