I didn’t challenge your intellectual integrity. I started by complementing your reasoning and just sought clarification by asking a question.
I’m asking because I am willing to change my mind when presented with a convincing argument. It seems to me you have a logical argument based on the premise that trans does not exist and therefore cis need not exist. The corollary in this argument is that if one trans exists, it logically means that not-trans exists.
I’m asked all the time to change my mind and do occasionally. I thought the purpose of your argument was to change someone’s mind, otherwise why make an argument — unless it is just a demonstration for people who already agree with you.
I’m the one caring about intellectual standards. But, if you choose to not avow your argument and be defensive, I can understand why.