Exactly that sort of false reductionism is missing the point.
While reduced sunlight can have a role in early stage height differences, this occurs both in cultivation and in nature and therefore is not a sole causative factor.
The sort of factors being indicated that were previously ignored by western horticulture are interaction based. Cultivated trees often face simplified fungal communities, limiting nutrient diversity compared to natural forests’ complex networks. Furthermore, natural forests exhibit interconnected fungal systems that facilitate nutrient redistribution between trees and improved community pathogen resistance.
The average person is unaware or thinks this is fantasy. They are ignorant. Don't be ignorant.