We have plenty of forests here in our country, some of it is rather old (woodcutting never really caught on here for some reason), but nothing near the size of the giga-hyper trees of RTW. Seriously, if there were such gigantic trees in Europe 2000 years ago, surely some would have survived?
In these weird RTW forests with 100-meter trees growing side by side (how the hell could they get enough nutrition this way?), you can't see s**t and that can really be annoying, especially if you can't afford many casualties.