I don’t agree. Kratochvilova was a sprinter who ran 800m (twice) once as a training run breaking the world record and a second time to win the World Champs. Her times for 100m and 200m were world class, very low 11 and 22’s. Obviously her 400m pedigree speaks for itself. She trainied as a sprinter and hence the physical attributes. If compared to the other female sprinters of the time she does not look out of place. Even by todays standards if you compare her to some of the Jamaican sprinters.
If you train for the 800m and 1500m on the other hand, you will be hard pressed to be able to have so much muscle. If Semenya trainied for the 400m and 800m, then maybe.