Exactly this.
And then there's some other contexts with the meat production to help realize that those billions might be better spent on something totally different. The US only produces about 30% more methane total than it did in the colonial days. Back then it was largely buffalo. SO long as there's a balance of things, we have a cycle of cows producing methane, breaking down to CO2, the CO2 being absorbed by crops, and the crops eaten by cows. Honestly, research in carbon seems to be the best focus if we want to make any improvements without just cutting down the major contributors. And the real biggest are fossil fuel emissions, mining, and deforestation.