There’s is a popular school of thought that the diet‘s sole purpose to reduce suffering. If a living thing has no central nervous system (or brain), it has no thoughts and cannot experience pain or harm. It’s not much different than a fruit or vegetable. I know vegans that make exceptions for oysters - for example.
Others schools of thought are about avoiding animal products altogether, it doesn’t matter if it suffers or not - there’s no way to know. Therefore, it’s immoral to eat them if you can knowingly choose an alternative.
It depends on the definition of Veganism.
There’s is a popular school of thought that the diet‘s sole purpose to reduce suffering. If a living thing has no central nervous system (or brain), it has no thoughts and cannot experience pain or harm. It’s not much different than a fruit or vegetable. I know vegans that make exceptions for oysters - for example.
Others schools of thought are about avoiding animal products altogether, it doesn’t matter if it suffers or not - there’s no way to know. Therefore, it’s immoral to eat them if you can knowingly choose an alternative.
Veganism is not only a diet. It’s an ethical stance and lifestyle.
Edit: clarifications