To be specific, arable land. Not all land is fertile. And as the old saying goes, they arent making any more :)
Then there is the time aspect. They dont grow as fast as one would like.
"The need for arable land to feed human populations and the needs of wildlife have been in tension for millennia. One can look to Easter Island to see what the end game of man's resource overexploitation can lead to. Currently more than 1.4 billion hectares of land have been committed to agriculture. As human populations swell, especially in lower latitudes, even more forests will be cut, surface water and aquifers tapped, fertilizers applied, and pesticides broadcasted—all of which threaten insects and other biodiversity either directly (e.g., land conversion and pesticide exposure) or indirectly (e.g., water use and nitrogen and phosphorus pollution). Savannahs, prairies, and grasslands, with their deep fertile soils, lend themselves to immediate use for crop and pasturelands, and as consequence are collectively among the most threatened biomes on the planet. The clearing of tropical forests for farming and pastureland is happening at alarming rates and will have especially grave consequences for insect species diversity"
Then there is the time aspect. They dont grow as fast as one would like.
"The need for arable land to feed human populations and the needs of wildlife have been in tension for millennia. One can look to Easter Island to see what the end game of man's resource overexploitation can lead to. Currently more than 1.4 billion hectares of land have been committed to agriculture. As human populations swell, especially in lower latitudes, even more forests will be cut, surface water and aquifers tapped, fertilizers applied, and pesticides broadcasted—all of which threaten insects and other biodiversity either directly (e.g., land conversion and pesticide exposure) or indirectly (e.g., water use and nitrogen and phosphorus pollution). Savannahs, prairies, and grasslands, with their deep fertile soils, lend themselves to immediate use for crop and pasturelands, and as consequence are collectively among the most threatened biomes on the planet. The clearing of tropical forests for farming and pastureland is happening at alarming rates and will have especially grave consequences for insect species diversity"
https://www.sciencedirect.com/topics/earth-and-planetary-sci...