If the wild plants were adaptable enough to conform to a GH habitat in the first place then why isn't the converse true? Also since my GH conditions are different from everyone else then why are we still able to transfer plants around to each other without loosing everything? However, there is no competition in the GH environment, and orchids in general are fringe or transition species that are not competitively aggressive. The loss of habitat issue really is key, and more subtle than most people believe. In many cases when orchids are removed from the wild several other activities may also occur making that habitat inhospitable to key plants. For instance adding roads to an area will often change the hydrology of an area by blocking recharge zones. This in turn favors growth of invasive or competitive interactions among understory plants even though the tree canopy is intact. Even though the forest would seem intact, the habitat is not the same and is hostile to replaced orchids (kind of like organ rejection in humans). Really the orchid hasn't changed ex situ, but the forest has changed and is now a different hostile habitat altogether. This makes even in situ conservation very difficult. You kind of need to ask how people are coming up with all these collected orchids in the first place? There's kind of a limit as to how far some one on foot with a sack on their back is willing to travel just to collect a plant for a pittance. The human communities are growing and spreading farther out into jungle habitats and making both subtle and gross changes as they develop. Generally when humans move into an area they bring changes with them that spread very far from the centers of both villages and cities. Paved roads are a small example. Habitat restoration is certainly doable (I have personal experience in this area), but it requires a lot of effort and attention.