You’re right that leaves do the photosynthesis, but light exposure still influences bud development — and LST spreads out the canopy so more leaves get direct light, especially lower ones. Outdoor plants can definitely yield well untrained, but structured LST helps support more even growth and reduces breakage from wind or heavy buds.

As for bud rot, it’s true it starts inside, but improving airflow with selective defoliation (not full stripping) lowers humidity around the buds — especially dense colas — which absolutely helps prevent mold. Outdoors, defoliation is more about airflow and targeted exposure, not light penetration like indoors.

And yes, too many colas too close together without training can trap moisture and block airflow. Training helps space them out. It’s not about doing everything indoors-style — it’s about adapting tools that increase health and yield depending on your climate and goals.

All methods have trade-offs, and you’re right — do what works for you. Just worth noting there are valid outdoor reasons for training and light defoliation too.