[rob74]

As the report on wood pellet production linked in your article mentions:

> Estonia is a forest-rich country; 51 per cent of the territory is covered by trees. Most forests in the country are classified as semi-natural, i.e. are composed of native tree species that have regrown after previous logging and have characteristics of undisturbed natural forests. Old-growth forests are rare in Estonia. About half of the forests belong to the State and are managed by the State Forest Management Centre (Estonian abbreviation: RMK). A significant share of the other half of Estonia’s forest that is in private hands is owned by large companies both domestic and foreign. Only 14 per cent of all Estonian forests is strictly protected meaning that no economic activities may take place in them. Various degrees of protection (e.g. limits to clearcutting) also apply to an additional 11.3 per cent of forests.

So only 14% of forests in Estonia are "completely" protected, and an additional 11.3% are partially protected (e.g. from clearcutting). Which means that around 75% are completely unprotected, even if they are semi-natural and have "characteristics of undisturbed natural forests". So these are actually "tree farms", just ones that have been left alone for slightly longer than usual. Of course, it's still painful to see them being cut down, but the real old-growth forest being cut down (or burnt) somewhere else (e.g. the Amazon rainforest) is far worse...