We have enough insight into the supply chain to know that the block of tofu is not the driver of the problem.

Soybeans have a high protein yield, hence why they're grown for feed. The plant fixates nitrogen as alluded to above. Soy is a complete protein, albeit with an amino acid profile that is not quite as similar to human muscle tissue as some meat.

It is a miracle plant! Soybeans are easy to prepare and taste fantastic, and can form the core of a healthy diet.