That caveat totally makes sense to me, thanks for bringing it up.

To talk it through: The benefit from tree fall seems to be a mix of increased light penetrating to the forest floor + detrivory & soil buildup from the fallen trees (which we can ignore due to the logging). The documentaries I’ve seen on rainforests emphasize how the ecosystem is layered among the canopy with many epiphytic plant species and animals adapted to life off the ground. So the increased light penetration may not balance out the loss in diversity among life that depends on adult trees. It probably depends on the relative balance/rarity among the different layers, and I don’t know enough to guess on where an appropriate balance is.