Actually I was agreeing with the point that being poor does not impede creative thinking. I agree with your point too that JK Rowling has an extraordinary sucess story.
But then again, we will never know about extremely creative yet poor people who are struggling to make ends meet and wasting their precious mental energy on things others take for granted.
But that does not discredit the original point (to which I was agreeing), that being poor is not an impediment to creativity.