We did! When my oncologist team at UCSC declared my liver mets inoperable, we researched our way to a different group (at Sloan-Kettering) that had success with 75% liver resections and then the two groups worked together. So there is some do your own research that could be valuable - but it’s more along the lines of a second opinion, and there is no magic.
You're the person who made the claim, which means you can provide the evidence to support it.
"Claims which are made without evidence can be dismissed without evidence." -Christopher Hitchens
https://en.wikipedia.org/wiki/Hitchens%27s_razor