In every other area of life we have to weigh up the evidence.
Or measure, or prove with experimentation: Case in point: The sun is a fact. Case in point: Experiment shows that the relationship between something and the sun under these conditions is always the case.
In this sense evolution has been "proven" beyond all reasonable doubt.
There is a difference between preponderance of the evidence and to prove beyond all reasonable doubt: There may be so much evidence to support something is true that it can be accepted as true (if magnitude of supporting evidence was the determining standard) or on the other hand, the reasonable possibility of something not being true inspite of all of the supporting evidence is what reasonable doubt means ( in the US criminal cases are tried with reasonable doubt as the deciding standard and not amount of evidence)
there is nothing that will convince unreasonable people.
But not agreeing with a conclusion or theory does not make one unreasonable. And there are reasons why not everyone is convinced that humanity evolved from the same ancestor as animals inspite of all of the evidence that science uses to support that conclusion.