It might be worth considering GPs comment as a case of projection, rather than a claim about the world to be rebutted. After all, they are part of the "everyone

It might be worth considering GPs comment as a case of projection, rather than a claim about the world to be rebutted. After all, they are part of the "everyone" they talk about. And the "everyone else is just as bad as I am, really" (also commonly phrased "we are not so different, you and I") is a classic asshole refrain. When someone tells you who they are, believe them.