User blog comment:Geomax/Jim Raynor vs Commander Shepard/@comment-4541447-20121208015834/@comment-71.94.222.253-20130730220352

Don't forget Jim in his time has had to deal with multiple psychics who are very similar to biotics, and shephard didn't do it alone it took a highly skilled team of very skilled people to do most of shepards accomplishments.

Shephard was yes chosen as a spectre, but not for military prowess alone. The political climate at the time almost demanded for a human spectre.