It seems as if you have the mistaken impression (or perhaps it is just a wish or suspicion) that fragrances are always created in high concentration form (extrait), and then they are somehow diluted for public consumption. That is not the case at all.
Look at this article about the various fragrances in the "Merveilles" family, all issued by Hermes.http://perfumeshrine.blogspot.com/2012/08/freq uent-questions-differences-between.html
Notice that the first one to be released was an edt (eau de toilette), created by Ralf Schweiger and Nathalie Feisthauer.
Notice that the second one, released a year later, was an edp (extrait de parfum) by J-C Ellena. Read the notes -- they are very different! So the second fragrance released is not simply a higher concentration than the first. It's altogether a different composition!
If you look at the rest of the Merveilles family described in that article, you may come to understand that this is but one illustration of the great variations that are possible in the creation and marketing of one fragrance. For example, Elixir des Merveilles is altogether different from both Eau des Merveilles edt and Eau des Merveilles edp!
One more thing, addressing again your question about the process of creating and marketing of fragrance. Here is an oversimplification of the process followed by a large fragrance house:
A house writes up a brief, which is a description of what they want in a perfume. A nose reads that brief, and creates a fragrance, and presents it to the house. There may be some back and forth, but the final version of the fragrance is the juice created by the nose, and accepted by the house. That is what is then sold on the shelves. And in most cases, the juice will contain many synthetic aromachemicals. Only indie houses dedicated to naturals avoid synthetics completely.