But, yes, if you were to grant him his postulate, then, yes, his conclusion would logically follow. If the moon were made of cheese, we could eat it. If we could abolish entropy, then we would never have to worry about running out of energy. As you can see, of course, my conclusions follow directly and logically from my premises. But you cannot postulate away existence .
Reality is reality.
Any such efforts cannot succeed. Reality is too hard for me to face. If only it did not exist. I want to escape it. I don't want the responsibility of dealing with reality.