Many people want to have the informed choice whether to use products with natural oakmoss and other potential sensitizers, but to make an informed choice they need to understand the way a sensitizer works. You can use a product that contains oakmoss for years and then all of a sudden start reacting to it with itchy, red rashes. It takes cumulative exposure before your body becomes sensitized enough to start reacting, and you never know when that might start, if at all. I have not been sensitized to anything so I can’t offer personal experience (I’m very lucky not to have any skin, sinus, or headache issues with fragrance at all, at least so far).
I hear a lot of people say just to avoid products with oakmoss “if you are allergic to it” but this really isn’t accurate. By exposing yourself to moss over and over you can become sensitized to it and start having allergic reactions on your skin. One of the big questions is how many people will be sensitized and whether the numbers merit regulating the material. That question has to be answered by research and statistics, and the regulating bodies decided it is enough of a problem to set rules on oakmoss levels. Then the next big question is what level of the sensitizer is acceptable in the product, and I suspect researchers don’t really know how low to set it in many cases. However, now that we have a good treated natural oakmoss with low levels of the two main identified sensitizers, atranol and chloroatranol, it makes sense to switch to the new moss to prevent new people from becoming sensitized.
For people to make informed choices, they need the information. A significant portion of fragrance collectors don’t understand how a sensitizer works, and the general public is probably more in the dark. All this talk about the issue should at least help people understand more about what sensitization involves.
Edited to add: I think consumers can make their own choices as long as the information gets to them. I hate to see fragrance labels looking like drug labels, but we may need to use more extensive and informative product labeling in order to leave as many choices up to the consumer as is possible. In the case of oakmoss though, the new natural moss product with low allergen levels really seems to make sense.