The article doesn't offer any reason why it shouldn't be the other way round - people with the described character traits are just more likely to like cats and therefore more likely to be exposed to toxoplasmosis.
Thats a very different idea from eating it exclusively.
For only using it as a replacement from one meal a day you might as well buy a blender, mix (frozen) fruit, oatmeal, wheat germ, honey, yogurt, milk and drink it.