Nearly (if not actually) all of the pulp required for paper comes from managed forests grown and harvested specifically to produce wood products over time. These tree farms are stable, not shrinking.
“managed forests” produce high amounts of waste and take away arable land and natural habitat quite aggressively [1]. what you have said here is a common propaganda perpetrated by industry advocates on the web and is often passed on as gyan without any scientific basis or authentic study or source to back it up.
hell, even critical thinking is missing when people write comments like this!
kind of like lobsters were cheap prison food in 1800s story:
https://www.reddit.com/r/history/comments/emcx69/the_history...
[1]https://en.m.wikipedia.org/wiki/Environmental_impact_of_pape...