Alright, it's mostly because trivialism is what is called a “degenerate logic” Insofar as it collapses distinctions, so for the trivialist, the truth-predicate is all inclusive and they essentially contain everything as part of the content of their position, they accept all contradictions, inconsistencies, etc so our traditional methods of trying to prove something wrong— like showing it is contradictory, fails against trivialism because that's just part of the content of their position. I wrote a piece on it a while back