cutting fan leaves arguement:

advantages, the leaves are said to block light from the budsites, this does happen to an extent as lower buds are smaller. Older fan leaves that are yellowing and dying should be cut off to reduce risk of infection.

Disadvantages: fan leaves are the plants solar panels and create a lot of energy, which goes to the budsites creating bigger buds. There is light invisible to the human eye that goes through the leaves to lower parts of the plant.

These are not my views but are mearly the arguements for and against