No, Dutch people would not be as good at sprinting if given the same training etc. Look into the ACTN3 protein, 'fast twitch muscles' etc. People of African ancestry have the lowest rate of having the mutation that prevents the ACTN3 protein from existing. On average, the Africans, particularly west Africans, have a big advantage here.

Note that there have only been a couple of 'whites' reach elite times in the last couple of decades, and no Asians.

Do you think that women have less physical strength than men on average for cultural reasons? Do you think that men are typically faster than women for cultural reasons?