Women and men have different physiologies, particularly in terms of how the typical "average" build works out and in terms of the configuration of hips. The finding that women are going to have more hip injuries than men should not consequently be surprising, and other injuries relating to, for example, carrying more than they should be carrying, being relatively higher in women is also to be expected.
However, the problem is that the methodology ends up being poor. People advocating for integration of women into the infantry or other physically intensive jobs are not expecting to use different physical fitness criterion for women and men for these jobs, so comparing average women to average men is not the appropriate metric to be evaluating them.