First of all, no one says that switching to organic farming can help the climate crisis. Switching to organic plant farming can (a Half of the world crop produce is fed to farm animals, and we'll learn in a couple of years that our bodies don't even assimilate the protein from meat).
Secondly, as most of such studies it only looks at direct shirt term effects. Optimising only those, we indeed come to conclusion that it's best to pour litres of roundup and get the highest product yields. Long term effects would be, come back, are more disastrous than most people realise. More or less obvious mistake it is, depending on the problem in question, it's important to always consider it from this angle. Short term remedies for complex systems may have the opposite consequences if applied in the long term.
I think we can snack on organic carrots as much as we wants