Why would it be obvious we should implicitly trust (since all they said is "trust me") a committer to a project that their project is better (in any dimension)

Why would it be obvious we should implicitly trust (since all they said is "trust me") a committer to a project that their project is better (in any dimension) than competitors to their project? That didn't make sense to me so I assumed they must not be a contributor to cachegrand.