1) There is no conspiracy among biologists/geneticist/etc. to hide or twist evidence regarding the common common ancestor theory of evolution. (I am not aware that anyone here thinks there is.)
2) As natural scientists, they are doing their best to theorize about how observable, testable, repeatable, natural processes have led to our current state.
3) The supernatural is not scientific. The spiritual is not scientific. By definition, the supernatural and spiritual cannot be involved in a scientific explanation. It's off the table.
4) Therefore, if the supernatural cannot be invoked in an explanation of the origination and reproduction/variety of life, then natural evolution is the best explanation (or so I hear). And since we're all here, it must have been possible.
When reading any article about singular and unrepeatable events in past eons, you can simply add "unless God involved Himself" to any proposition and accept it for that. The game is called "How Did We Get Here Assuming Nothing Supernatural?" Some people (not here) don't understand that that's the game, I think, and some people think that non-scientific (i.e., the spiritual/supernatural, namely, God) is the same as anti-scientific.
Obviously, our beef is with the natural scientist who says that there isn't anything supernatural. Science can't prove or disprove the supernatural. If science could measure or observe the supernatural, then it wouldn't be supernatural. I reckon that any thoughtful "scientist" acknowledges these things.
By the way, I am a scientist. ... a computer scientist, but a scientist nonetheless. It's in writing and everything. (Yet when I read, "Scientists say ...," I can never remember them asking me about it.

There is at least some proof here that some people embrace the naturalistic theory of evolution for non-scientific reasons.