More people who eat 3 cows a week and drive a monster truck 40 miles each way to work? No. More people who mostly eat plants and mostly take the train or ride their bike where they need to go? Shouldn't be a big problem.
3 cows a week is an insane amount of food. Most I can manage is 1.75, but my average is 1.1. Which is actually quite nice, because that's about the most I can comfortably fit in my monster truck.
It was an exaggeration, but my point is that focusing on population when one person can easily have ten times (or more) the impact of someone else seems like a distraction.