Ok, so you are asserting that asserting someone is wrong without evidence is the same thing is asserting that there is an objective truth without evidence?
Like, if you said "2+2=5" and I said "There is only one correct answer to 2+2" both of those require equal evidence?
Edit: Because, here's the thing; fundamentally, effectiveness in a dice game like D&D comes down to statistics, which makes it a math problem. And to me, saying that the result of a math problem will always be the same regardless of variables is as objectively false as saying that 2+2=5.