The assistant seems to be a hero of this story being the first to draw attention to the low approach and missed approach, but the role is going the way of the runway-caravan leaving a controller with ever more ancillary tasks and less chance to continuously observe safety essentials such as runway and gear. The first approach wasn’t far off the energy profile being slightly fast and slightly low, but correcting? Wouldn’t this have been a successful, if messy landing without ATC intervention and we’d have heard no more about it? Most ATCOs have zero flying experience and often never see anything other than 3 degree glide path approaches so don’t really have the required knowledge to say when a flight is dangerously positioned. If every missed approach adds a degree of risk it could be argued than an ATCO could lead to a more dangerous situation with an unnecessary go-around instruction than by leaving the pilots to fly the plane.