If I believed there was any way this approach would work, I might support it (probably not though to be hoinest😅), but it won't. You can't silo off a word by skin colour.
As I've said before, I want the word to disappear from our lexicon. To be a ward that nobody thinks to use, or at least that nobody takes very seriously. Like "cracker" or "peckerwood" or honky". These words weren't reclaimed by white people, they were de-powered. It would feel silly trying to use these words to wound a white person.
This is what I want to see happen to the n-word too. Everyone should be allowed to say it. I just want nobody to want to.