Some people can. Some people find that the phytochemicals associated with those plant proteins, when consumed in quantities, cause significant gut and hormonal

Some people can. Some people find that the phytochemicals associated with those plant proteins, when consumed in quantities, cause significant gut and hormonal problems (phytoestrogens impacting androgen production, for example). And that says nothing about the current questions about whether soy increases breast cancer risk. Soy is obviously not the only plant protein. My current favorite is mushroom-based, but it is new, and industrial food doesn't have a good track record.