Everyone has an opinion so here's mine.
If you are shooting, with a rifle, at any distance less than about 200 yards you don't need a rangefinder. Even if you sight in at 100 yards you won't experience enough drop, in a hunting situation, where you need to know if it's 150, 175 or 200 yards to the target.
If you bow hunt from a stand then using a rangefinder initially to figure out how far it is to "that bush, that rock, that opening etc" is almost vital, but with a bow the difference between your 15 yard pin and 30 yard pin IS significant.
In a dense situation, from a stand, a rangefinder will not "look through" leaves, foliage, branches etc - it bounces off whatever the beam hits, so you would get varying readings at best - and if it's that dense you wouldn't see the deer (or whatever) at any sort of distance anyhow.
The golf rangefinders are pretty much the same technology - they all "measure distance" and would certainly work to mark the distance to "some object".
Where a range finder is useful is if you are shooting across open fields or from one hilltop to another, because most of us "suck" at judging how far and often "over estimate" by as much as 50 or 100% to actual distance.