Best times by women are not where they should be.
Examples, based on her 400 speed, 50 seconds, an 1500 strength, Semenya could run close to 1.50-1.52.
Obiri and Ayana could both go sub. 14 and sub 29 for 5000/10,000 in oltimal conditions.
If Japanese women with limited track speed, i.e. 15.30/32.00, are able ti run marathons in 2.21-2.23, then stronger and faster women, worth around 14.40 should be in the 2:15-2:17 range for marathon.