A man with no philosophy in him is the most inauspicious and unprofitable of all possible social mates.
The soybean itself is a notably inauspicious staple food; it contains a whole assortment of "antinutrients" - compounds that actually block the body's absorption of vitamins and minerals, interfere with the hormonal system, and prevent the body from breaking down the proteins of the soy itself.
The inauspiciousness of the owl is nothing but the inauspiciousness of the man who thinks that owl is inauspicious!