I suppose he’s hearkening to the “Earth has gone through several heating and cooling periods through the eons, so what we’re experiencing now is nothing new or unnatural” argument against AGW.
I would argue that it doesn’t matter whether the earth was once a billion degrees on the surface a hundred million years ago, but it does matter if the ocean levels raise 10 inches within the next hundred years.
Will they? I dunno. Be worth trying to figure out and attempt to prevent though.