Respuesta
The collection of N. lobata would alter biodiversity, but it is nothing compared to how beneficial it would be for the treatment of Chagas disease in Costa Rica, since its appearance among the population is frequent. A large part of the population that suffers from Chagas can not afford it, as increasing the plantation of N. lobata would make it more affordable for them to obtain the plant both for treatment and for the other benefits it offers.
I think that probably a group of foreigners are the ones who would be harvesting the plant, since the companies when they are going to start a project have already chosen the personnel with whom they are going to work.