that response honestly sounds like he is referring to a caricature of schizophrenia as the ultimate ignorable and irreconcilable mental health disorder and doesn't actually know how we treat schizophrenia either

how do we treat schizophrenia? it is something that can also be managed

thats the primary limitation of the analogy. the secondary limitation of the analogy is that un-ironically accepting pronouns that otherwise bend the English language really costs us nothing, and gives us productive members of society instead of marginalized.