You may disagree with me, but I am not factually wrong.
What is missing from your post is any reference to elite performance data that can be reliably attributed to doping that would be impossible without doping.
"prodigious evidence of confirmed doping" is evidence of "faith in doping", and not evidence of unnatural performance.
Selected examples of former stars being caught is evidence that former stars, or their coach/agent/doctor/husband/etc. had "faith" in doping. Both fast and slow athletes dope. But this doesn't establish that doping made them faster, or that other faster athletes are doping.
"not widely known" is another way of saying "faith".
It is irrelevant to me how athletes evade positive tests, as this will not provide the necessary performance data. Discussing testing at all is not relevant until it is established how relevant doping is to these elite distance performances. We take it on faith that the result of the best doping-performance studies, can be applied to the best performances of elite athletes. We take it on faith that athletes caught doping were unnaturally faster because of doping.
The premise of this whole thread, and many others, is that doping is necessary to produce fast performances like Kiplimo's and Ruth's -- this is a faith-based premise not based on any relevant performance data or evidence.
I'm happy to look at the facts, if you can provide some relevant ones.