Evolution is slow in catching up. It may take thousands of generations. We must understand evolution to understand human mating. That which exists should exist. This opposes evolutionary theory.
Male jealousy can lead to wife beating.
It doesn't have to be this way. This, like other behaviors, can change. Evolutionary explanations imply sexual inequality, foster unchanging conditions, keep women from power, may perpetuate stereotypes, etc. Buss feels that women may adopt certain sexual strategies, but they don't have to.