Taking care of orchids is both a popular hobby and for many a thriving business.  Orchids are now found naturally on all continents except for Antarctica, hence there are specialists all over the world taking care of orchids.  The florist market alone consumes millions of blooms daily, this is a demand which needs to be met by the growers and they cannot afford to have irregular supplies as they will loose costume, hence the extensive expertise of those taking care of the orchids.