edit: Gross that you're being downvoted. HN crowd needs a serious look in the mirror.
I think the main issue is that no matter which word/phrase is used, some people will use it as a slur, and changing it so often causes more issues than it solves.
Oooor, try this one on for size:
What if they're not out to cause offense and the malice you impute is just an illusion under which you yourself are laboring alone? What if it was a well understood and not particularly offensive vernacular usage from before people decided they ought to spend their time being offended on behalf of hypothetical listeners?
They were stung. "I'm not poor!" I felt so bad about it that it's stuck with me all these years. Does that mean because I've seen first hand how hurtful it can be that I should chide people whenever they use the P word?
And that analogy isn't even accurate because I'm not the one informing you that the word can be hurtful. You're using it already knowing that. So a better question is did you continue to say "oh, poor baby" to the kids who were hurt by your original comment?
I don't think you would continue using it, that was the point I was making and it sounds like you now agree with me that we shouldn't be knowingly offensive.
Yet in the years since, I still talk about poor decisionmaking, poor luck, poor performance, and poor word choice. Because it would be poor logic to go through life auditing everything I say just in case a middle schooler with a somewhat poor vocabulary might mistake my meaning.
"Poor" has non-offensive uses so you can continue to use it in other ways. You don't need to advocate for the non-offensive uses of a slur. You know regardless of the context, some people will be offended by its use.