Thank you for bringing up your child's experience.
When I teach around fairness in terms of disability, we have this statement, “Fairness does not mean everyone gets the same. Fairness means everyone gets what they need.”
If we use the first definition of fairness, which is giving everyone the same thing, then anybody on this committee who wears glasses would have to take them off, because not everybody can wear glasses.
When we talk about quantifying, in education we can quantify. In multiple studies over many decades, what we can quantify is that when you have an inclusive practice, bullying goes down for children, tolerance levels get high for all children, and learning improves for all children. That is quantifiable evidence in terms of the notion that when we add diversity, and with that diversity, add the support needed to protect it, we absolutely have an added benefit for that.