As a person who grew up with agriculture, I am going to defend it with my life, but as politely as possible.
Ag has pretty much always existed and always will. If we didn’t have a large ag industry, everyone would have to grow their own food, which means we would have even more agricultural, but less variety in stores. You wouldn’t be able to get fresh fruits and vegetables year round, everyone would have to learn how to preserve foods, meat would become a special treat, and the people who can’t grow food would starve.
Agriculture provides jobs to thousands of people. Less than 2% of the US population are farmers or ranchers, but that's still a ton of people. The Ag industry as a whole provides the most jobs out of any industry, from farming to vet science to grocery stores. Millions of people would lose their jobs without agriculture. It is arguably the most important industry period.
It is not agriculture's fault that the population is getting out of hand. The fault lies with people who act irresponsibly with what their body can do. People need to decide if the for sure want a kid before doing what it takes to have one. The population wouldn’t be nearly as out of control if people were more responsible about this.
Overall, we wouldn’t be anywhere near where we are now without Ag. Instead of people being doctors, lawyers, or students they would all have to spend time finding and growing food. We wouldn’t have all that we have come to enjoy today.