Gibson was not fined for
using, but for
importing rosewood. That is a fundamental difference. Plant species (wood is a plant product) can be protected by the CITES convention. This lists species of plants, and thus wood species, that are protected by international law.
Three appendices indicate the level of protection for a particular species. Only one rosewood species,
Dalbergia nigra or Brazilian rosewood, is listed in appendix I. Several others, including all rosewood from Madagascar (which is the product that Gibson was fined for) and cocobolo, are listed in appendix II. That means you are legally allowed to buy the wood in your own country and use the wood for whatever purpose. But you are not allowed to bring wood from appendix II (and also appendix I of course) across the border. So you can't order Madagascar rosewood or cocobolo from any other country then your country of residence; importation is regulated but the use is not. However, there is an ethical debate whether you want to use a wood that is listed as vulnerable to extinction unless the importation is regulated.
I've not tried any species of rosewood for bows. I've seen one though, and have read about a few others. In my opinion it is decent in compression, but not as good as ipé. So it does not justify the factor three price difference, unless the wood is exceptionally beautiful. Many other woods are cheaper and better, but I agree that a piece of rosewood can be really stunning. I don't know about your piece, but I hope its appearance will make up for the high price.