Natural Selection Seems Insufficient

[Angrboda]

That's like saying a false dichotomy is a well known fallacy. Perfectly correct - once you've show a particular example to be a false dichotomy.  You have to do the work. In the same way, incredulity is a fallacy only when you've shown  a particular example to be a wholly unjustified incredulity. You have to do the work. Duh.

You've got the burden of proof backward again. I don't need to show that your incredulity is unjustified, you need to show that your incredulity is justified. Until you do, the defect is self-evident.

I'll be more than happy to provide you with an analysis of any specific justification for your incredulity you feel that you have provided. Your OP was largely bare assertions of incredulity.