As I mentioned on another thread, removing trees over a certain size costs money as the regular greens crew can't necessarily do the work themselves (licences, insurance, h&s etc) so outside specialist contractors are required.
Outside specialist contractors are costly however, and with clubs watching the cash closely there's a financial limitation on hiring them unless really, really necessary. The outcome at a course with lots of trees, irrespective of whether they were deliberately planted in decades gone by are or the result of lack of cutback-when-small maintenance, is that not many trees will likely come down each year. Plus there's the usual tree-hugger resistance movement to overcome. And trees and scrub grow bigger and wider and taller every year. Todays sappling will be pretty big in afew years.
This doesn't mean though that future growth shouldn't be limited by the regular greens crews cutting back small trees and scrub before they get too big for them to handle. This should be, and I would like to believe it is, standard practice at clubs where finances permit an appropriate greens crew size.
Once-upon-time many inland courses in certain parts of the world were cut (eaten) by sheep and cattle and horses and goats etc and. All this meant less trees on courses as the shoots of any new growth trees and scrub would be nibbled away before it could grow. In addition, trees and scrub were cleared for firewood and fencing and building and furniture etc.
Society has moved on however, but that doesn't mean that in certain, although not all, parts of the world inland courses still can't have their maintenance aided by livestock. Nature working with nature?
Atb