This claim is not substantiated by evidence. It requires an equivocation between Homo sapiens and “all our ancestors.” This is an example of the ecological fallacy.
The fact of the matter is we know that Homo sapiens dip down (backward time) to zero, so that obviously goes down below 10,000. Your heliocentric claim is transparently false.
You have missed it. That is a caricature of the argument and what is required for a genetic bottleneck. Someday we can press that argument, but its not worth it now.
More importantly, this is not related to your prior claim above, which is clearly not substantiated by evidence, and precisely false.