Um, my position was that some people have a disability when it comes to math - which you agree with. My other position was that not everyone can do engineering math. This is not mutually exclusive from the idea that you can get better at math. None of your studies report turning people with significant math problems into CalTech engineering graduates.
I don’t think we really disagree on much here - we both agree that people should have to try to learn math if they can, and that math skills are malleable to some extent. I do not think that someone who tries to learn algebra and fails should be barred from being a music teacher due to very vague speculation about how this will inspire kids to suck at math, and I do think that there is some genetic component to math ability - I don’t think either of these propositions is very contestable.