I can't comment on the math or the how, but I do have a caveat: Rotting trees are actually absolutely pivotal for biodiversity and maintaining healthy forest

I can't comment on the math or the how, but I do have a caveat: Rotting trees are actually absolutely pivotal for biodiversity and maintaining healthy forest ecosystems. So there's a tradeoff there. No idea how much could be done without being a problem, but probably it would need to be very spread out geographically, which makes it harder in practice.