"Your surface claim has some unsavory connotations/implications that you don't need to make. All the things you want can be had without making that claim. (unless you have some ulterior motives you haven't mentioned)."
One of two things should happen if they remain engaged:
A) They will point to some new relevant considerations (perhaps even winning me over),
B) We will discover that the remaining difference is mostly about word usage,
(end)