Why do non-LDS Christians accept the testimonies of the apostles but reject the testimonies of the 3 & 8 witnesses to the golden plates?

Simple question: non-LDS Christians believe the testimonies of the apostles, yet they reject the testimonies of the (https://en.wikipedia.org/wiki/Three_Witnesses) & (https://en.wikipedia.org/wiki/Eight_Witnesses) witnesses to the golden plates. Why? *In the mouth of two or three witnesses shall every matter be established* (2 Cor 13:1) -- why is this reason not enough? _____ EDIT: Why should they? From a Latter-day Saint perspective, because this is one of the positive arguments for the divine inspiration of the Book of Mormon -- which should be of the utmost importance if it happens to be the case. See [this answer](https://christianity.stackexchange.com/a/83978/50422) and [this answer](https://christianity.stackexchange.com/a/83904/50422) for example presentations of this argument. _____ Related: [Is there anything close to a consensus on how to assess the credibility of eyewitness accounts as supportive evidence for supernatural beliefs?](https://christianity.stackexchange.com/q/84551/50422) _____ For a defense of the credibility of the Book of Mormon witnesses (the opposite view), see https://christianity.stackexchange.com/q/89274/50422