My opinion is just that plant physiology is very well documented, we know what plants need to be healthy and vigorous and in nearly all cases vigorous plants are all you need to keep an aquarium from being sullied by algae..
That is really not true IMO. It might be in general aquatic plant husbandry, but I don't think it's applicable to all aquariums. If you have a sparsely planted tank in terms of mass, even if the plants are healthy it's probably not going to be enough to keep the tank from attracting algae. How would it? To rely only on healthy plants to keep a tank algae free would be very limiting in aquascape design.