Sigma Nutrition is not related to the more recently trending term of Sigma Male and its brand of toxic masculinity if that is what you are worried about.

I’m not sure where you’re seeing this stated as the leading reason? It sounds like the straw man arguments by those who dismiss concerns with sodium intake. You may be interested in the following discussion https://sigmanutrition.com/episode375/

If you can get people to leave the pile alone long enough, composting is safe and yields a useful end product https://humanurehandbook.com/