You are correct. Pathogens in
humanure cannot translocate into and through the vascular systems of plants (unlike chemicals!) I would however at least trench it in or put clean heavy mulch over top. Flies are a main vector....they
land on humanure and then come directly to food, fruit, etc. Low-growing plants are vulnerable to being splashed by heavy rain too. And beware of where runoff may go in a heavy rain. All of these and other reasons make composting or direct burial the best practices....