It sounds like you're saying that fan leaves closest to a bud help that bud grow. Would it then make sense to pinch fan leaves that are further from the bud if they shade the bud's own fan leaves?
Cannabis plants are vascular. Nutrients and water flow through their xylem and phloem much like blood flows through our own veins and arteries.
Think of the leaves as little stomachs spread out around the plant, using photosynthesis instead of acid to 'digest' nutrients into usable compounds.
When you pluck the fan leaves, you're removing one of these 'stomachs' and limiting the total amount of food the plant can synthesize. It's not that the opposite bud gets a boost when you remove the fan leaf, it is just that the nutrient solution in the plant is less concentrate by the time it gets to the part of the plant you plucked. Other parts have already fed off of it, and the leaf you removed would have replenished the food flowing through that part of the plant.
If you were to restrict the blood flow to your left hand, would your right grow bigger? Hell no, your left would just grow at a slower rate.
We should let our plants be. Keep their vascular system as intact as possible for the duration of the grow,and the plant will reward us nicely.