Consensus is write it only if you have something meaningful to say. If you make up some bullshit, the ad-coms aren't stupid and will know it. It could then hurt you, or best-case scenario, not help at all.
I've read a few diversity statements written by white males. The best come across as boring and/or exaggerated; the worst come across as bitter. They also show poor judgment, IMO.
That said, I'm sure there are white males who could write great diversity statements - those who have done things that make them genuinely diverse. If you spent your childhood in the Highlands of Papua New Guinea with your missionary parents, for example, write a DS. If you grew up in the suburbs, don't bother.