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.