The current methods of farming, both animal and plants, needs to change to a sustainable regenerative model. Any system that requires external inputs (especially petrochemical inputs) wont work long term. Plants and animals work together to regenerate topsoil and are essential to the biocycle.

This -

There is a gap in current production (3billion vs 7 billion), but the health of the people depends on closing this gap (more focus on range land, de-vilifying animal nutrition). Right now we are not prioritizing meat production and people's health is suffering, I hope we can rectify that.

Cannot be reconciled with this. The difference in land use is absolutely insurmountable. What you're suggesting would require turning every scrap of undeveloped, farmable land into farmland. We would have no wilderness left.

That ignoring the huge flaw in your fishing calculation. Global fish populations are plummeting. Harvesting so much is also wildly unsustainable and the entire fishing industry is headed for collapse if we don't reign in how much we collect every year.

There are a lot of things 'the rich' have done through history that should not be used as a model of how we should structure our society.