I think it's possible that "coming out" makes a statement of equality for some people. That our bdsm life is not categorically different than the lives of so many others. It would possibly allow for acceptance rather than simple acknowledgement.

That being said, I feel that my personal life is very personal. It makes my feelings more powerful to me and I hope, just as meaningful to my other if they are truly private and special. I am grateful though for those that were willing to come before me, as I may not have explored the lifestyle without the writings, etc. that are available to me, because of their public stance.