Personal choice. I really hate those two particular words.
https://www.vox.com/identities/2017/11/9/16627900/ta-nehisi-...
What would be a better reason? Or, do you think white people should feel free to use that word?
Because there was a time when white people felt free to use that word, and there are still pockets of white society where people feel free to use that word, and if you think those times or those people are good ones to emulate, I'd be quite interested to know why you think that.
I think all people should feel free to use whatever words they want to use as long as they are speaking truth.
Because it seems like "don't say hurtful things" covers a lot of stuff, but you miss out on the specific empathy this specific situation gives you by reflecting on why this one word should be taken off the table for white people.