I wonder about these DNA studies, not that I am disputing the findings, but as time goes by, they find out more and more about DNA (like “jumping genes” and epigenetics) that make it hard to come to such a linear conclusion as “this group is the oldest...” etc.
And given the EXTREME bottleneck of the Toba supervolcano event ~75KYA BP, any results need to be factored greatly.
Mankinds population at that time fell to about 5,000 individuals WORLDWIDE! Almost an extinction event!
There’s no bottleneck if one rejects the basis of the DNA studies, which you did in your first sentence.