Switching to plant based alternatives won’t really fix the large fields of soy and corn that are the issue. We may need less to feed cattle then, but then we will need to produce more plant protein for direct human consumption or even bioreactors.
"More than three-quarters (77%) of global soy is fed to livestock for meat and dairy production. Most of the rest is used for biofuels, industry or vegetable oils. Just 7% of soy is used directly for human food products such as tofu, soy milk, edamame beans, and tempeh"
> fields of ... corn that are the issue
Corn crop is mainly used for biofuels (40%) and as animal feed (36%)