How often did we practise go-arounds on the RAF VC10? Several times per training sortie. 3-engined and 2-engined go-arounds also flown under the supervision of FIs. Not difficult, hardest part was levelling off after the go-around; 96% on all 4, accelerate and climb at 190 KIAS, retract flaps/slats at 1500 ft then manage the level off at 2500 ft to be stable at 210 KIAS - all whilst flaps/slats were moving. The manoeuvre wasn't dangerous, just required regular practice and sound manual flying skills....
Go-arounds are extremely rare in the civil world. Is getting behind the drag curve ar$eing about with an over-automated aircraft running away from you very likely to happen given the very low opportunity for practice nowadays? I would be very worried indeed to think that a crew could get so close to the edge of disaster attempting something as very basic as a low go-around.