Do girls always have to be agaisnt boys

Gender Wars Case One: All Boys vs. All Girls sports teams
Recently in school we had a California kickball game with boys vs. girls. The girls lost epiclly seeing as most of us can't kick the ball nearly as hard as the boys. When I questioned my teach as too why he couldn't have split us up into real teams he responded with "Its easier this way." I think this is entirely unfair. As much as I hate to admit I"m weaker than a boy but its a harsh fact of life, boys naturally have more muscle than girls. And when you're always striking out before you get to first base that brings up the question: What the hell am I doing in P.E. class if I get to kick a ball, run five steps then go sit down and wait for everybody else to strike out? This completely defeats the purpose of gym in the first place.