Veganism is LITERALLY an ethical stance regarding exploiting/harming/killing non-human animals.
Finding a random blog online that states otherwise means nothing. Anyone who ate a salad last Tuesday these days thinks they can simply decide what Veganism is.
THIS is the actual definition of Veganism, directly from the people who coined the term:
“Veganism is a philosophy and way of living which seeks to exclude—as far as is possible and practicable—all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose; and by extension, promotes the development and use of animal-free alternatives for the benefit of animals, humans and the environment. In dietary terms it denotes the practice of dispensing with all products derived wholly or partly from animals."