I apologize that my reply does not meet your standards. It is not my intent to "move the goalposts", but simply to convey a mindset you seemed not to recognize,

I apologize that my reply does not meet your standards. It is not my intent to "move the goalposts", but simply to convey a mindset you seemed not to recognize, in order to help you understand why they might have included that concern. You now grasp that mindset, even if my construction was terrible. I am grateful that you were able to discern my intent regardless.