That…doesn’t say what you think it says. It tells you what conversion therapy was designed to do. Conversion therapy as a treatment for homosexuality is, by definition, based on the assumption that homosexuality is a disease or disorder. Otherwise there would be nothing to “treat”.
It is a fact that that is how conversion therapy was designed. But acknowledging the fact of what it’s for and how it came to be is not a statement on its efficacy. Those are two very separate things.